UE nerve lesions Flashcards
p413, 414
Arm hangs by side and is medially rotated, extended, and pronated. Lesion?
Erb palsy: Upper trunk (C5/6 roots)
Total claw hand. Lesion?
Klumpke palsy: lower trunk (C8-T1)
Atrophied intrinsic hand muscles + arm is edematous, painful, ischemic. Lesion?
Thoracic outlet syndrome: compression of lower trunk + subclavian vessels
Winged scapula + can’t abduct arm above horizontal position
LTN: C5-C7
Lateral traction on neck during delivery… Lesion?
Erb palsy: Upper trunk (C5/6 roots)
Guy falls and lands on spot btwn head and shoulder… Lesion?
Erb palsy: Upper trunk (C5/6 roots)
Pull baby out up its arm during delivery. Lesion?
Klumpke palsy: lower trunk (C8-T1)
Bird lady falls out of a tree and grabs a branch to break her fall. Lesion?
Klumpke palsy: lower trunk (C8-T1)
2 common causes of thoracic outlet syndrome?
Pancoast tumor and cervical rib injury
2 common causes of winged scapula?
Axilary node dissection post-mastectomy. Getting stabbed.
Flattened deltoid; loss of arm aBduction >15 degrees; loss of sensation over delt and lateral arm. Nerve lesion?
Axillary
Axillary roots?
C5-C6
Loss of forearm flexion and supination; loss of sensation over lateral forearm. Nerve lesion?
Musculocutaneous
Musculocutaneous roots?
C5-C7
Loss of elbow, wrist, finger extension (wrist drop); decreased grip strength; loss of sensation over posterior arm/FA and dorsal hand. Nerve lesion?
Radial
Radial n roots?
C5-T1
Loss of wrist and lateral finger flexion, thumb opposition, lumbricals of 2nd and 3rd digits. Ulnar deviation on wrist flexion. Loss of sensation over thenar eminence, and lateral 3.5 digits. Nerve lesion?
Proximal median n
Median n roots?
C5-T1
Loss of wrist and lateral finger flexion, thumb opposition, lumbricals of 2nd and 3rd digits. Ulnar deviation on wrist flexion. +Tinel sign. Nerve lesion?
Distal median n (Carpel tunnel)
Clawing on digit extension. Radial deviation of wrist on flexion; loss of flexion of wrist and medial fingers; loss of abduction and adduction of fingers; loss of sensation of medial 1.5 fingers + hypothenar eminance. Nerve lesion?
Proximal ulnar n lesion
Ulnar n roots?
C8-T1
Clawing on digit extension; loss of flexion of wrist and medial fingers; loss of abduction and adduction of fingers; loss of sensation of medial 1.5 fingers + hypothenar eminance. Nerve lesion?
Distal ulnar n lesion
Ape hand (loss of opposition, abduction and flexion of thumb) w/ no loss of sensation. Nerve lesion?
Recurrent branch of median n
Fractured surgical neck of humerus can cause what nerve lesion?
Axillary
Anterior dislocation of the humerus can cause what nerve lesion?
Axillary
Midshaft fracture of humerus can cause what nerve lesion?
Radial
Crutches can cause what nerve lesion?
Radial
Sleeping w/ arm over back of chair can cause what nerve lesion?
Radial
Supracondylar fracture of humerus can cause what nerve lesion?
Median (prox)
Carpal tunnel can cause what nerve lesion?
Median
Wrist laceration can cause what nerve lesion?
Median (distal)
Fracture of the medial epicondyle of the humerus can cause what nerve lesion?
Ulnar (prox)
Fracture of hook of hamate can cause what nerve lesion?
Ulnar (distal)
Elbow dislocation w/ posterior displacement of ulna can cause what nerve lesion?
Ulnar
Superficial laceration of palm can cause what nerve lesion?
Recurrent branch of median n
Guyon canal syndrome can cause what nerve lesion?
Ulnar
Who gets guyon canal syndrome?
Cyclists (from pressure of handlebars)
Dislocation of what wrist bone can cause acute carpal tunnel syndrome?
Lunate
