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Free Orthopedics Review | Dr Hutaif General Orthopedics -...

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FREE Orthopedics MCQS 2022 1351 -1400

QUESTION 1
In comparing the clinical efficacy of intra-articular sodium hyaluronate injections vs triamcinolone injections for the treatment of hallux rigidus, which factor showed significantly better improvement in the sodium hyaluronate group:
1
Gait pain
2
Pain at rest
3
Pain with passive mobilization
4
Use of analgesics
5
Pain with palpation
QUESTION 2
Which anatomical feature does not predispose patients to peroneal tendon dislocation:
1
Shallow peroneal groove
2
Insufficient superior peroneal retinaculum
3
Peroneus quartus
4
Low-lying peroneus brevis muscle belly
5
Varus heel alignment
QUESTION 3
A 39-year-old man has a forced dorsiflexion injury while skiing. Radiographs taken in the emergency department show a small avulsion flake off the lateral surface of the fibula distally on the mortise view. This patient most likely has:
1
A lateral process of the talus fracture
2
An osteochondral fracture of the talus
3
An anterior process of the calcaneus fracture
4
A peroneal tendon dislocation
5
A syndesmotic sprain
QUESTION 4
Which of the following is not considered to be a risk factor for peroneal tendon tears:
1
Shallow retromalleolar groove
2
Gastrocnemius-soleus contracture
3
Ligamentous laxity
4
Varus hindfoot alignment
5
Recurrent lateral ankle ligament instability
QUESTION 5
The thoracic outlet syndrome is characterized by:
1
The invariable presence of abnormal congenital structures such as cervical ribs or costovertebral synestosis
2
Proximal compression of upper extremity neurologic and vascular structures at one of multiple
3
A high incidence of vascular symptoms and a low incidence of neurological symptoms
4
C ompression of the subclavian vein between the anterior and middle scalene muscles
5
A frequently identifiable traumatic precipitant.
QUESTION 6
A typical presentation of thoracic outlet syndrome is likely to include:
1
An upper plexus constellation involving median nerve innervated muscles being the most common.
2
Sensory loss and diminished strength at initial evaluation
3
Venous obstruction presenting as edema and cyanosis progress to subclavian or axillary vein thrombosis.
4
Symptoms that are present at rest and alleviated by upper extremity acitivity
5
Normal somatosensory evoked potentials in the affected extremity
QUESTION 7
Primary treatment of thoracic outlet syndrome should include:
1
First rib resection with scalenectomy
2
C laviculectomy
3
Psychiatric evaluation
4
Activity modification and shoulder girdle strengthening
5
First rib resection without scalenectomy
QUESTION 8
The term acrosyndactyly describes digits that are:
1
Joined by bone only
2
Joined by soft tissue only
3
Joined proximally but separated distally
4
Joined along the entire length of the web space
5
Joined at the tips but separated proximally
QUESTION 9
In normal development, the differentiation of the interdigital web space is influenced by which of the following factors:
1
Bone morphogenetic protein (BMP)
2
Fibroblast growth factor-3 (FGF-3)
3
Interleukin-1 (IL-1)
4
Apical ectodermal ridge maintenance factor (AERMF)
5
Thalidomide
QUESTION 10
Syndactyly may be isolated, it may be bilateral, or it may occur as part of a broader genetic syndrome. Which of the following syndromes are commonly associated with syndactyly:
1
Down syndrome (trisomy-21)
2
Polandâs anomaly
3
Marfan syndrome
4
VATER association
5
Hunter syndrome
QUESTION 11
Surgical separation of syndactylized fingers produces two separate digits with an increase in total surface area. How are the gaps in coverage left by eliminating the common side between the two fingers best addressed:
1
Full-thickness skin graft
2
Split-thickness skin graft
3
Fascio-cutaneous graft
4
Rotation flap
5
No graft is necessary; the defects will heal by secondary intention
QUESTION 12
The of the brachial plexus emerge between the anterior middle scalane muscles:
1
Roots
2
Trunks
3
Divisions
4
C ords
5
Branches
QUESTION 13
Dupuytren contracture is a progressive disease involving:
1
Proliferative fibrodysplasia of the flexor tendons in the palm.
2
Pretendinous bands of the palmar aponeurosis which form nodules and cords causing metacarpophalangeal joint contracture.
3
A chronic inflammatory response with an increase in type 2 collagen in the flexor tendon sheath.
4
C ontracture beginning distally at the level of the distal interphalangeal joint and extending proximally as the disease progresses.
5
A predilection for young women between the ages of 20 and 40 with exacerbation of symptoms during pregnancy.
QUESTION 14
Which of the following statements is true:
1
Spinnerâs sign is an early sign of anterior interosseous nerve compression.
2
Electromyography/nerve conduction velocity is usually normal in pronator syndrome.
3
The ligament of Strutherâs and the arcade of Strutherâs refer to the same structure.
4
Forearm pronation is usually weak with anterior interosseous nerve syndrome.
5
The pain of pronator syndrome is dull aching in the proximal forearm that is worse with activity and awakens patients at night.
QUESTION 15
Initial treatment for De Quervain disease involves:
1
Occupational therapy with active range of motion and strengthening of the wrist extensors.
2
Surgical release of the extensor pollicis longus tendon as it wraps around Listerâs tubercle.
3
Steroid injection of the second dorsal compartment followed by range of motion exercises.
4
Activity modification, steroid injection of the first dorsal compartment, followed by splinting full time for 3 to 4 weeks.
5
Surgical release of the first dorsal compartment.
QUESTION 16
The ulnar nerve arises from:
1
The lateral cord of the brachial plexus containing fibers from the C 6 and C 7 nerve roots.
2
The medial cord of the brachial plexus containing fibers from the C 8 and T1 nerve roots.
3
The posterior cord of the brachial plexus containing fibers of the C 5 and C 6 nerve roots.
4
The lateral trunk of the brachial plexus containing fibers from C 7 through T1.
5
The C 5 through C 7 nerve roots immediately before the upper trunk.
QUESTION 17
Which of the following statements is true:
1
Posterior interosseous nerve syndrome and radial tunnel syndrome describe the same clinical syndrome with separate causes.
2
The radial nerve spirals around the humeral shaft with the radial artery.
3
The posterior interosseous nerve contains both motor and sensory fibers.
4
Wartenberg's sign and Wartenberg's syndrome are both related to radial nerve compression.
5
The most common site of proximal radial nerve compression is the leash of Henry.
QUESTION 18
The treatment of stenosing tenosynovitis should include all of the following except:
1
Release of the A1 pulley.
2
Release of the A1 pulley and flexor tendon tenosynovectomy.
3
Splinting and nonsteroidal anti-inflammatory drugs (NSAIDs).
4
Steroid injections between the flexor tendon and the A1 pulley.
5
Release of the A1 and A2 pulleys.
QUESTION 19
Swan-neck deformity can be caused by which of the following:
1
C entral slip rupture
2
Flexor digitorum profundus avulsion fracture (Jersey finger)
3
Acute extensor tendon avulsion fracture
4
Dorsal proximal interphalangeal joint dislocation (middle phalanx dorsal to proximal phalanx)
5
Metaphalangeal (MP) arthroplasty
QUESTION 20
Which of the following identifies the clinical finding of inadvertent hyperextension of the thumb metaphalangeal joint during attempted thumb-index finger pinch?
1
Froment's sign
2
Jeanne's sign
3
Duchenne's sign
4
Pollock's sign
5
Wartenberg's sign
QUESTION 21
The Bunnell procedure to provide index finger abduction in ulnar nerve palsies refers to:
1
Transfer extensor indicis proprius (EIP) to the first dorsal interosseous
2
Split and transfer EIP to the first dorsal interosseous and the adductor pollicis
3
Transfer extensor pollicis brevis (EPB) to the first dorsal interosseous
4
Transfer EPB with EIP to the adductor pollicis
5
Transfer flexor digitorum sublimis to the proximal phalanx of the thumb
QUESTION 22
Ganglions most commonly arise from the:
1
Scapholunate interosseous ligament
2
Scaphotrapezial joint
3
Pisotriquetral joint
4
Dorsal distal interphalangeal joint
5
Flexor tendon sheath
QUESTION 23
Pain from a dorsal carpal ganglion is caused by:
1
Tendinitis
2
Posterior interosseous nerve impingement
3
Median nerve impingement
4
Premalignant synovial degeneration
5
Mass effect
QUESTION 24
Optimal treatment for a symptomatic ganglion is:
1
Observation
2
C losed rupture
3
Aspiration
4
Surgical excision
5
C orticosteroid injection
QUESTION 25
The following pair of tendons is affected in De Quervain disease:
1
Extensor pollicis longus and extensor pollicis brevis
2
Abductor pollicis longus and extensor pollicis longus
3
Abductor pollicis brevis and extensor pollicis longus
4
Opponens pollicis and abductor pollicis brevis
5
Abductor pollicis longus and extensor pollicis brevis
QUESTION 26
Poor or incomplete resolution of symptoms following first dorsal compartment release for De Quervain disease would most likely occur as a result of:
1
Early return to activity
2
Superficial radial sensory nerve injury
3
Abductor pollicis longus laceration
4
Incomplete release
5
Pseudoaneurysm in the radial artery
QUESTION 27
When performing a tendon transfer to restore thumb index finger lateral pinch in an ulnar nerve palsy, which tendon, when transferred to the 1st dorsal interosseous provides the greatest power?
1
Flexor digitorum profundus (FDP)
2
Extensor indicis proprius (EIP)
3
Extensor digitorum communis (EDC )
4
Extensor carpi radialis brevis (EC RB)
5
Extensor carpi radialis lingus (EC RL)
QUESTION 28
In the diagnosis of a boutonniere deformity, a patient will not present with:
1
Laxity in the intrinsic system leading to passive hyperflexion of the distal interphalangeal joint, with the proximal interphalangeal joint held in extension.
2
Ecchymosis at the base of the middle phalanx, with a dorsal avulsion fragment from the middle phalanx base on the x-ray.
3
Full extension at the proximal interphalangeal joint, with the wrist and metacarpophalangeal joint fully flexed but inability to extend the distal interphalangeal joint with the hand in this position.
4
Active hyperextension at the proximal interphalangeal joint, with full flexion at the distal interphalangeal joint, but no active flexion at the proximal interphalangeal joint.
5
Pain and swelling over the metacarpophalangeal joint, with full flexion and extension over the proximal interphalangeal joint and distal interphalangeal joint.
QUESTION 29
In the diagnosis of a boutonniere deformity, a patient may present with:
1
Laxity in the intrinsic system leading to passive hyperflexion of the distal interphalangeal joint, with the proximal interphalangeal joint held in extension.
2
Flexion deformity of the PIP joint with ecchymosis at the base of the middle phalanx, with a dorsal avulsion fragment at the middle phalanx base on radiograph, as well as inability to actively extend the PIP joint.
3
Full extension at the proximal interphalangeal joint, with the wrist and metacarpophalangeal joint fully flexed but inability to extend the distal interphalangeal joint with the hand in this position.
4
Active hyperextension at the proximal interphalangeal joint, with full flexion at the distal interphalangeal joint, but no active flexion at the proximal interphalangeal joint.
5
Pain and swelling over the metacarpophalangeal joint, with full flexion and extension over the proximal interphalangeal joint and distal interphalangeal joint.
QUESTION 30
Horner syndrome includes all of the following except:
1
Miosis
2
Anhidrosis
3
Enophthalmos
4
Exophthalmos
QUESTION 31
Axonotmesis involves injury to which of the following structure:
1
Epineurium
2
Endoneurium
3
Perineurium
4
Axon
QUESTION 32
All of the following may be seen with preganglionic lesion EXC EPT:
1
Horner syndrome
2
Hemi-diaphragmatic palsy
3
Positive Histamine test
4
Tinel sign
QUESTION 33
Weakness of which of the following muscles is not seen with root avulsion:
1
Rhomboids
2
Serratus anterior
3
Supraspinatus
4
Trapezius
QUESTION 34
In obstetric brachial plexus injury, return of which of the following muscle by 3 months is considered an indicator of plexus recovery:
1
Biceps
2
Triceps
3
Brachioradialis
4
Latissimus
QUESTION 35
A 15-year-old white boy presents to your office with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and says his neck was twisted away at the time of fall. He was seen at the local emergency department; skull, chest, cervical and thoracic spine, and shoulder x-rays showed no damage. There was no loss of consciousness and he has no chest pain or breathing difficulties. He was observed in the hospital until stable and was referred to follow up in the hand clinic at 4 weeks and scheduled for an electromyogram.
C linical examination reveals weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature is preserved and he can grasp and release and pinch. Sensations are decreased along the distribution of axillary nerve. There is 3 cm wasting of his arm and 2 cm of his forearm. Tinel sign is positive around the clavicle. Horner signs are absent and his arm lies against the body. The EMG report shows fibrillation potentials in the weak muscles. The parents are concerned and say they have not seen any improvement. The boy reports that he is now able to flex his elbow. When asked to demonstrate you notice that he flexes his wrist and pronates his forearm to âswingâ his elbow into flexion.
The diagnosis of the boyâs condition is:
1
Brachial plexus neuropraxia
2
Erbâs palsy
3
Brachial plexus neuritis
4
C 5, C 6 disk herniations
QUESTION 36
A 15-year-old white boy presents to your office with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and says his neck was twisted away at the time of fall. He was seen at the local emergency department; skull, chest, cervical and thoracic spine, and shoulder x-rays showed no damage. There was no loss of consciousness and he has no chest pain or breathing difficulties. He was observed in the hospital until stable and was referred to follow up in the hand clinic at 4 weeks and scheduled for an electromyogram.
C linical examination reveals weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature is preserved and he can grasp and release and pinch. Sensations are decreased along the distribution of axillary nerve. There is 3 cm wasting of his arm and 2 cm of his forearm. Tinel sign is positive around the clavicle. Horner signs are absent and his arm lies against the body. The EMG report shows fibrillation potentials in the weak muscles. The parents are concerned and say they have not seen any improvement. The boy reports that he is now able to flex his elbow. When asked to demonstrate you notice that he flexes his wrist and pronates his forearm to âswingâ his elbow into flexion.
What is the level of lesion:
1
Postganglionic C 5, C 6
2
Preganglionic C 5, C 6
3
Posterior cord injury
4
Middle trunk
QUESTION 37
A 15-year-old white boy presents to your office with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and says his neck was twisted away at the time of fall. He was seen at the local emergency department; skull, chest, cervical and thoracic spine, and shoulder x-rays showed no damage. There was no loss of consciousness and he has no chest pain or breathing difficulties. He was observed in the hospital until stable and was referred to follow up in the hand clinic at 4 weeks and scheduled for an electromyogram.
C linical examination reveals weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature is preserved and he can grasp and release and pinch. Sensations are decreased along the distribution of axillary nerve. There is 3 cm wasting of his arm and 2 cm of his forearm. Tinel sign is positive around the clavicle. Horner signs are absent and his arm lies against the body. The EMG report shows fibrillation potentials in the weak muscles. The parents are concerned and say they have not seen any improvement. The boy reports that he is now able to flex his elbow. When asked to demonstrate you notice that he flexes his wrist and pronates his forearm to âswingâ his elbow into flexion.
What is the least helpful test in further management of this patient:
1
Magnetic resonance imaging
2
C omputer tomography scan of the neck
3
Repeat electromyogram after 4 weeks
4
Somatosensory evoked potential (SSEP)
QUESTION 38
A 15-year-old white boy presents to your office with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and says his neck was twisted away at the time of fall. He was seen at the local emergency department; skull, chest, cervical and thoracic spine, and shoulder x-rays showed no damage. There was no loss of consciousness and he has no chest pain or breathing difficulties. He was observed in the hospital until stable and was referred to follow up in the hand clinic at 4 weeks and scheduled for an electromyogram.
C linical examination reveals weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature is preserved and he can grasp and release and pinch. Sensations are decreased along the distribution of axillary nerve. There is 3 cm wasting of his arm and 2 cm of his forearm. Tinel sign is positive around the clavicle. Horner signs are absent and his arm lies against the body. The EMG report shows fibrillation potentials in the weak muscles. The parents are concerned and say they have not seen any improvement. The boy reports that he is now able to flex his elbow. When asked to demonstrate you notice that he flexes his wrist and pronates his forearm to âswingâ his elbow into flexion.
The plan of management in this boy 5 months after injury with no clinical improvement should be:
1
Neurotization
2
Exploration and nerve grafting
3
C ontinued observation
4
Tendon transfers
QUESTION 39
A 15-year-old white boy presents to your office with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and says his neck was twisted away at the time of fall. He was seen at the local emergency department; skull, chest, cervical and thoracic spine, and shoulder x-rays showed no damage. There was no loss of consciousness and he has no chest pain or breathing difficulties. He was observed in the hospital until stable and was referred to follow up in the hand clinic at 4 weeks and scheduled for an electromyogram.
C linical examination reveals weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature is preserved and he can grasp and release and pinch. Sensations are decreased along the distribution of axillary nerve. There is 3 cm wasting of his arm and 2 cm of his forearm. Tinel sign is positive around the clavicle. Horner signs are absent and his arm lies against the body. The EMG report shows fibrillation potentials in the weak muscles. The parents are concerned and say they have not seen any improvement. The boy reports that he is now able to flex his elbow. When asked to demonstrate you notice that he flexes his wrist and pronates his forearm to âswingâ his elbow into flexion.
What will be the most important indication for an early exploration in this case:
1
Absence of biceps function at 3 months
2
Absence of biceps function with return of extensor carpi radialis longus (EC RL) power at 4 months
3
Presence of âtrickâ movements
4
Subluxation of humeral head on x-ray
QUESTION 40
A 15-year-old white boy presents to your office with inability to elevate his right shoulder and flex his elbow. He sustained a fall from an all-terrain vehicle 8 weeks ago. He landed on the right shoulder and says his neck was twisted away at the time of fall. He was seen at the local emergency department; skull, chest, cervical and thoracic spine, and shoulder x-rays showed no damage. There was no loss of consciousness and he has no chest pain or breathing difficulties. He was observed in the hospital until stable and was referred to follow up in the hand clinic at 4 weeks and scheduled for an electromyogram.
C linical examination reveals weakness of deltoid, supraspinatus, infraspinatus, teres minor, biceps, brachialis, brachioradialis, and extensor carpi radialis longus. The remainder of his forearm musculature is preserved and he can grasp and release and pinch. Sensations are decreased along the distribution of axillary nerve. There is 3 cm wasting of his arm and 2 cm of his forearm. Tinel sign is positive around the clavicle. Horner signs are absent and his arm lies against the body. The EMG report shows fibrillation potentials in the weak muscles. The parents are concerned and say they have not seen any improvement. The boy reports that he is now able to flex his elbow. When asked to demonstrate you notice that he flexes his wrist and pronates his forearm to âswingâ his elbow into flexion.
The most important function that needs to be restored in this boy is:
1
Shoulder abduction
2
Shoulder elevation
3
Elbow flexion
4
Wrist extension
QUESTION 41
An 18-month-old boy is brought to your office for a clawing deformity of his right hand. The parents inform you that he was born full term after a difficult delivery complicated by shoulder dystocia. The boy weighed 9½ lbs at birth. The child had a brief episode of apnea with an APGAR score of 5 at birth and needed resuscitation and admission to the natal intensive care unit. Parents recall having noted a bump on his right clavicle, which was tender and was diagnosed as clavicle fracture. They also noticed a week later that the child did not flex the fingers of his right hand. The neonatologist had informed them that the
fracture is managed conservatively and the absence of finger flexion is due to the fracture and shall recover. They were warned that the recovery can be prolonged and can take up to 2 years. The boy has grown well and has achieved his milestones on time. His immunization is complete for his age.
You find a healthy, playful boy who tends to use his left hand to reach for objects. His right hand has extension at all the metacarpophalangeal (MC P) joints of the fingers while his proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints are flexed. His thumb is an adducted position and it is difficult to passively bring it to full abduction. There is obvious wasting of the hand and forearm. The child is able to move the arm well with no abnormalities noticed at the shoulder, elbow, and the wrist. The x-ray of his chest shows a healed clavicle fracture with no evidence of diaphragmatic paralysis. There is no evidence of Horner Syndrome and the grasp reflex is absent.
The diagnosis of this boyâs condition is:
1
Erbâs palsy
2
Klumpkeâs palsy
3
C erebrovascular accident
4
Ulnar and median combined nerve injury
QUESTION 42
An 18-month-old boy is brought to your office for a clawing deformity of his right hand. The parents inform you that he was born full term after a difficult delivery complicated by shoulder dystocia. The boy weighed 9½ lbs at birth. The child had a brief episode of apnea with an APGAR score of 5 at birth and needed resuscitation and admission to the natal intensive care unit. Parents recall having noted a bump on his right clavicle, which was tender and was diagnosed as clavicle fracture. They also noticed a week later that the child did not flex the fingers of his right hand. The neonatologist had informed them that the
fracture is managed conservatively and the absence of finger flexion is due to the fracture and shall recover. They were warned that the recovery can be prolonged and can take up to 2 years. The boy has grown well and has achieved his milestones on time. His immunization is complete for his age.
You find a healthy, playful boy who tends to use his left hand to reach for objects. His right hand has extension at all the metacarpophalangeal (MC P) joints of the fingers while his proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints are flexed. His thumb is an adducted position and it is difficult to passively bring it to full abduction. There is obvious wasting of the hand and forearm. The child is able to move the arm well with no abnormalities noticed at the shoulder, elbow, and the wrist. The x-ray of his chest shows a healed clavicle fracture with no evidence of diaphragmatic paralysis. There is no evidence of Horner Syndrome and the grasp reflex is absent.
The level of the lesion in this boyâs case is:
1
preganglionic lesion
2
postganglionic lesion
3
lateral cord
4
posterior cord
QUESTION 43
An 18-month-old boy is brought to your office for a clawing deformity of his right hand. The parents inform you that he was born full term after a difficult delivery complicated by shoulder dystocia. The boy weighed 9½ lbs at birth. The child had a brief episode of apnea with an APGAR score of 5 at birth and needed resuscitation and admission to the natal intensive care unit. Parents recall having noted a bump on his right clavicle, which was tender and was diagnosed as clavicle fracture. They also noticed a week later that the child did not flex the fingers of his right hand. The neonatologist had informed them that the
fracture is managed conservatively and the absence of finger flexion is due to the fracture and shall recover. They were warned that the recovery can be prolonged and can take up to 2 years. The boy has grown well and has achieved his milestones on time. His immunization is complete for his age.
You find a healthy, playful boy who tends to use his left hand to reach for objects. His right hand has extension at all the metacarpophalangeal (MC P) joints of the fingers while his proximal interphalangeal (PIP) and distal interphalangeal (DIP) joints are flexed. His thumb is an adducted position and it is difficult to passively bring it to full abduction. There is obvious wasting of the hand and forearm. The child is able to move the arm well with no abnormalities noticed at the shoulder, elbow, and the wrist. The x-ray of his chest shows a healed clavicle fracture with no evidence of diaphragmatic paralysis. There is no evidence of Horner Syndrome and the grasp reflex is absent.
Appropriate surgical management in this case should be:
1
Neurotization
2
Exploration and nerve grafting
3
Tendon transfers
4
Neurolysis
Dr. Mohammed Hutaif
Written & Medically Reviewed by
Consultant Orthopedic & Spine Surgeon