Upper Extremity Innervations, Including Brachial Plexus

Front 1

Brachial plexus Upper trunk lesion causes?

Back 1

Trauma like birth or motorcycle accident, causes Waiters tip (erb's palsy). C5, C6.
Axillary and suprascapular nerve lesioned causing: medially rotated and adducted shoulder.
Musculocutaneous: forearm extended and pronated, also loss of sensory of lateral forearm to base of thumb.

Front 2

C7 root lesion?

Back 2

compression by cervical disk lesion

Front 3

Lower Trunk of Brachial Plexus lesion?

Back 3

compressed by cervical rib or by pancoast tumor of lung. leads to klumpke's palsy

Front 4

Inferior dislocation or fracture of surgical neck of humerus?

Back 4

axillary nerve damage, can't abduct arm to horizon, and sensory loss over deltoid

Front 5

Radial nerve (C5,6,7,8) lesion at axilla

Back 5

Saturday night palsy or improper use of crutch. loss of extensors in arm (wrist drop) and sensory loss of posterior arm, forearm, dorsum of thumb

Front 6

Mid shaft of humerus at radial groove or lateral epicondyle.

Back 6

Radial nerve damage. Loss of arm extensors (wrist drop) and sensory loss of posterior arm.

Front 7

Supracondylar Fracture of humerus damages what nerve?

Back 7

Median nerve.
- weakened wrist flexion
- loss of pronation
- loss of flexion of lateral 3 digits and inability to make a fist (Hand of Benediction)
- Loss of thumb opposition (ape/simian hand)
- Sensory loss of palmar surface of hand

Front 8

Carpal tunnel compression or laceration

Back 8

Median nerve damage. loss of thumb opposition (ape/simian hand).
- loss of first 2 lumbricals
- Thenar atrophy
- Sensory loss over palmar surface

Front 9

Fracture of medial epicondyle of humerus?

Back 9

Ulnar nerve damage.
- Loss of hypothenar muscles, 3-4 lumbricals, all interossei and adductor pollicis
- loss of abduction and addution of digits 2-5.
- weakened IP extension of 2-5
- loss of thumb adduction
- atrophy of hypothenar eminence
- Claw Hand
-

Front 10

Fracture of the Hook of the Hammate or just the Hammate

Back 10

Ulnar nerve damage.
- Loss of hypothenar muscles, 3-4 lumbricals, all interossei and adductor pollicis
- loss of abduction and addution of digits 2-5.
- weakened IP extension of 2-5
- loss of thumb adduction
- atrophy of hypothenar eminence
- Claw Hand

Front 11

Midshaft clavicle fracture

Back 11

Ulnar nerve damage.
- Loss of hypothenar muscles, 3-4 lumbricals, all interossei and adductor pollicis
- loss of abduction and addution of digits 2-5.
- weakened IP extension of 2-5
- loss of thumb adduction
- atrophy of hypothenar eminence
- Claw Hand

Front 12

Superficial laceration of thenar muscle?

Back 12

Recurrent branch of Median nerve.

Front 13

Compression of deep forearm damages what nerve?

Back 13

Anterior interosseous nerve

Front 14

Stab wound to lateral chest?

Back 14

Long thoracic nerve damage
winged scapula

Front 15

Tennis elbow

Back 15

lateral epicondylitis, repeated use leads to tiny tears in tendons and muscles.

Front 16

Golfer's elbow

Back 16

Medial epicondylitis, repeated use leads to tiny tears in tendons and muscles.

Front 17

Anterior hip dislocation?

Back 17

Obturator L2-4,
cant adduct thigh
sensory loss medial thigh

Front 18

Pelvic fracture

Back 18

Femoral L2-4.
can't flex thigh or extend leg
sensory loss in anterior thigh and medial leg

Front 19

Trauma to lateral aspect of leg or fibula neck frature

Back 19

Common Peroneal (L4-S2)
Foot drop deficit
sensory loss of anterolateral leg and dorsal aspect of foot

Front 20

Knee Trauma, what nerve deficit?

Back 20

Tibial (L4-S2)
Loss of foot inversion and plantarflexion; toe flexion
sensory loss of sole of foot

Front 21

Posterior Hip dislocation or Polio

Back 21

Superior Gluteal nerve (L4-S1)
loss of thigh abduction.
Positive trendelenburg sign. (hip drops when standing on opposite foot)

Front 22

Posterior hip dislocation

Back 22

Inferior Gluteal (L5-S2)
Cant jump, climb stairs, or rise from a seated position, cant push inferiorly (downward)

Front 23

Sciatic Nerve (L4-S2) splits into common peroneal and tibial nerves. Peroneal is "PED" Tibial is"TIP" what is PED and TIP

Back 23

PED = Peroneal Everts and Dorsiflexes, if injured, foot dropPED
TIP = Tibial Inverts and Plantarflexes, if injured, can't stand on TIPtoes.