Peripheral Nerve Damage

Question 1

Radial
Motor Functions (inability to):
Region of Sensory Loss:

Answer 1

Extend arm, wrist (wrist drop), and finger joints, supinate forearm, abduct thumb in plane of palm.

Post lat arm, post strip on forearm, dorsal surface thumb, lat surface (thumb side) of hand, & dorsum of first 3.5 digits.

Question 2

Median
Motor Functions (inability to):
Region of Sensory Loss:

Answer 2

Flex and oppose thumb, flex digits 2&3, flex or abduct wrist (ape hand), pronate forearm.

Lateral palm, ventral thumb and digits 2&3, dorsal tip of thumb and digits 2&3.

Question 3

Ulnar
Motor Functions (inability to):
Region of Sensory Loss:

Answer 3

Adduct and abduct fingers other than thumb, adduct thumb, flex digits 4&5 (claw hand), flex and adduct wrist.

Medial palm, all of the 5th digit and the medial side of the 4th digit.

Question 4

Axillary
Motor Functions (inability to):
Region of Sensory Loss:

Answer 4

Abduct arm at shoulder beyond 15 degrees.

Spot on lateral arm over the deltoid.

Question 5

Musculocutaneous
Motor Functions (inability to):
Region of Sensory Loss:

Answer 5

Flex arm at elbow, supinate forearm.

Lateral forearm.

Question 6

Femoral
Motor Functions (inability to):
Region of Sensory Loss:

Answer 6

Flex leg at hip, extend knee.

Portion of ant thigh, knee, and medial leg.

Question 7

Obturator
Motor Functions (inability to):
Region of Sensory Loss:

Answer 7

Adduct thigh.

Spot on medial thigh.

Question 8

Sciatic
Motor Functions (inability to):
Region of Sensory Loss:

Answer 8

Flex knee/extend hip.

Lateral leg and most of foot.

Question 9

Tibial (br. Sciatic)
Motor Functions (inability to):
Region of Sensory Loss:

Answer 9

Plantar (ventri) flex or invert foot, flex toes.

Bottom of foot and toes, lateral edge dorsum foot and tips of toes 2-5.

Question 10

Superficial Fibular (Peroneal br. Sciatic)
Motor Functions (inability to):
Region of Sensory Loss:

Answer 10

Evert foot.

Dorso-lateral leg, most of dorsal foot.

Question 11

Deep Fibular (Peroneal br. Sciatic)
Motor Functions (inability to):
Region of Sensory Loss:

Answer 11

Dorsiflex foot, extend toes (dorsiflexion).

Spot between big and 2nd toe.