OCS EXAM NERVES WITH ALL CORRECT & 100%
VERIFIED ANSWERS|LATEST VERSION|UPDATED TO
PASS
local conduction block due to segmental demyelination
no axonal abnormality
excellent prognosis ✔Correct answer-neuropraxia
axonal injury involving Wallerian degenration distal to the injury site
axonal sprouting occurs
very good prognosis ✔Correct answer-axonotmesis
transection of the nerve
prognosis extremely poor ✔Correct answer-neurotmesis
this sensory nerve distribution tests the integrity of the superior trunk of the brachial plexus
✔Correct answer-lateral antebrachial cutaneous (branch of musculocutaneous nerve (C5, C6)
provides sensation to the lateral forearm
this sensory nerve distribution tests the integrity of the inferior trunk of the brachial plexus
✔Correct answer-median nerve to D1 & D2 (medial palmar surface of the hand D1-1/2 D4 and the
dorsal tips of D1-3)
medial antebrachial cutaneous nerve (sensation to medial arm and forearm to palmar side of wrist)
to test integrity of C5-7 ventral/anterior rami test this muscle ✔Correct answer-serratus anterior
(long thoracic nerve) push against the wall, looking for winging
C5 ventral/anterior rami test ✔Correct answer-rhomboids (dorsal scapular nerve)
this type of sensory injury has symptoms that're proximal to distal, transient ✔Correct answer-
symptoms of a sensory nerve root (dermatome injury)
this type of sensory injury has symptoms that're distal to proximal ✔Correct answer-peripheral
sensory problem
these type of sensory injuries will go both ways, 11% of CTS ✔Correct answer-double crush injuries
this nerve innervates supraspinatus and infraspinatus ✔Correct answer-suprascapular nerve (C5,
C6)
this nerve innervates deltoid and teres minor; sensory to skin over upper lateral part of arm
✔Correct answer-axillary (C5, C6)
this nerve innervated serratus anterior ✔Correct answer-long thoracic (C5-7)
this nerve innervates upper trapezius and SCM ✔Correct answer-spinal accessory CN XI
, this nerve innervates all the muscles in the anteior compartment of the forearm (except flexor carpi
ulnaris and medial half of FDP), three thenar muscles (APB, FPB, OP) of the thumb, two lateral
lumbrical muscles
it is sensory to the skin over the palmar surface of the lateral 3 and 1/2 digits and over the lateral
side of the palm and middle of wrist; DIP to D1-3 on dorsal surface of hand ✔Correct answer-
median nerve (C5, C6-T1)
this nerve innervates all intrinsic muscles of the hand (except three thenar muscles and 2 lateral
lumbricals); also flexor carpi ulnaris and the medial half of flexor digitorum profundus in the forearm
sensory to the skin over the palmar surface of the medial one and one half digits and the associated
palm and wrist, and skin over the dorsal surface of the medial 1 and 1/2 digits ✔Correct answer-
ulnar nerve (C7, C8-T1)
this nerve invervates all muscles in the posterior compartments of the arm and forearm
sensory to the skin on the posterior aspects of the arm and forearm, the lower lateral surface of the
arm, and the dorsal lateral surface of the hand (except DIP dorsally of D1-3, which is median nerve)
✔Correct answer-radial nerve (C5-C8, T1)
this nerve innervates the pec major ✔Correct answer-lateral pectoral C5-C7
this nerve innervated the pec major (Sternal head) and pec minor ✔Correct answer-medial
pectoral (C8-T1)
this nerve innervates all muscles in the anterior comparment of the arm (biceps, brachialis,
coracobrachialis)
sensory to skin on lateral side of forearm (through the lateral cutaneous nerve of the forearm)
✔Correct answer-musculocutaneous nerve C5-7
this nerve innervates subscapularis ✔Correct answer-superior subscapular nerve C5-6
this nerve innervates the latissimus dorsi ✔Correct answer-thoracodorsal C6-8 posterior cord
this nerve innervates the subscapularis and teres major ✔Correct answer-inferior subscapular (C5,
6)
median nerve mononeuropathy:
Most common compressive neuropathy
pathologic (inflamed) synovium most common cause of idiopathic
Epidemiology
affects 0.1-10% of general population
risk factors
female sex
obesity
pregnancy
hypothyroidism
rheumatoid arthritis
VERIFIED ANSWERS|LATEST VERSION|UPDATED TO
PASS
local conduction block due to segmental demyelination
no axonal abnormality
excellent prognosis ✔Correct answer-neuropraxia
axonal injury involving Wallerian degenration distal to the injury site
axonal sprouting occurs
very good prognosis ✔Correct answer-axonotmesis
transection of the nerve
prognosis extremely poor ✔Correct answer-neurotmesis
this sensory nerve distribution tests the integrity of the superior trunk of the brachial plexus
✔Correct answer-lateral antebrachial cutaneous (branch of musculocutaneous nerve (C5, C6)
provides sensation to the lateral forearm
this sensory nerve distribution tests the integrity of the inferior trunk of the brachial plexus
✔Correct answer-median nerve to D1 & D2 (medial palmar surface of the hand D1-1/2 D4 and the
dorsal tips of D1-3)
medial antebrachial cutaneous nerve (sensation to medial arm and forearm to palmar side of wrist)
to test integrity of C5-7 ventral/anterior rami test this muscle ✔Correct answer-serratus anterior
(long thoracic nerve) push against the wall, looking for winging
C5 ventral/anterior rami test ✔Correct answer-rhomboids (dorsal scapular nerve)
this type of sensory injury has symptoms that're proximal to distal, transient ✔Correct answer-
symptoms of a sensory nerve root (dermatome injury)
this type of sensory injury has symptoms that're distal to proximal ✔Correct answer-peripheral
sensory problem
these type of sensory injuries will go both ways, 11% of CTS ✔Correct answer-double crush injuries
this nerve innervates supraspinatus and infraspinatus ✔Correct answer-suprascapular nerve (C5,
C6)
this nerve innervates deltoid and teres minor; sensory to skin over upper lateral part of arm
✔Correct answer-axillary (C5, C6)
this nerve innervated serratus anterior ✔Correct answer-long thoracic (C5-7)
this nerve innervates upper trapezius and SCM ✔Correct answer-spinal accessory CN XI
, this nerve innervates all the muscles in the anteior compartment of the forearm (except flexor carpi
ulnaris and medial half of FDP), three thenar muscles (APB, FPB, OP) of the thumb, two lateral
lumbrical muscles
it is sensory to the skin over the palmar surface of the lateral 3 and 1/2 digits and over the lateral
side of the palm and middle of wrist; DIP to D1-3 on dorsal surface of hand ✔Correct answer-
median nerve (C5, C6-T1)
this nerve innervates all intrinsic muscles of the hand (except three thenar muscles and 2 lateral
lumbricals); also flexor carpi ulnaris and the medial half of flexor digitorum profundus in the forearm
sensory to the skin over the palmar surface of the medial one and one half digits and the associated
palm and wrist, and skin over the dorsal surface of the medial 1 and 1/2 digits ✔Correct answer-
ulnar nerve (C7, C8-T1)
this nerve invervates all muscles in the posterior compartments of the arm and forearm
sensory to the skin on the posterior aspects of the arm and forearm, the lower lateral surface of the
arm, and the dorsal lateral surface of the hand (except DIP dorsally of D1-3, which is median nerve)
✔Correct answer-radial nerve (C5-C8, T1)
this nerve innervates the pec major ✔Correct answer-lateral pectoral C5-C7
this nerve innervated the pec major (Sternal head) and pec minor ✔Correct answer-medial
pectoral (C8-T1)
this nerve innervates all muscles in the anterior comparment of the arm (biceps, brachialis,
coracobrachialis)
sensory to skin on lateral side of forearm (through the lateral cutaneous nerve of the forearm)
✔Correct answer-musculocutaneous nerve C5-7
this nerve innervates subscapularis ✔Correct answer-superior subscapular nerve C5-6
this nerve innervates the latissimus dorsi ✔Correct answer-thoracodorsal C6-8 posterior cord
this nerve innervates the subscapularis and teres major ✔Correct answer-inferior subscapular (C5,
6)
median nerve mononeuropathy:
Most common compressive neuropathy
pathologic (inflamed) synovium most common cause of idiopathic
Epidemiology
affects 0.1-10% of general population
risk factors
female sex
obesity
pregnancy
hypothyroidism
rheumatoid arthritis
