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39 Cards in this Set

  • Front
  • Back
which nerves innervate the diaphragm?
C3
C4
C5
(primarily)
How many roots does the brachial plexus have and what are they?
C5
C6
C7
C8
T1
How many trunks does the brachial plexus have? What are they called? Which roots contribute to them?
3 trunks
Superior/Upper: C5 and C6
Middle: C7.
Inferior/Lower: C8 and T1
How many divisions are there in the brachial plexus?
6 divisions:
3 anterior/ventral
3 posterior/dorsal.
How many cords are there in the brachial plexus? What are their contributing nerve roots?
3 cords.
Lateral (C5-7).
Posterior (C5-8 and T1)
Medial (C7 and T1)
Which nerve roots contribute to the musculocutaneous nerve?
C5
C6
C7
Which nerve roots contribute to the axillary nerve?
C5
C6
Which nerve roots contribute to the radial nerve?
C5
C6
C7
C8
T1
(all 5 roots)
Which nerve roots contribute to the median nerve?
C5 C6 C7 C8 (T1 contribution is inconsistent)
Which nerve roots contribute to the ulnar nerve?
C8
T1
musculocutaneous nerve: motor? sensory?
Motor: biceps muscle (flex forearm)

Sensory: Lateral mid-forearm
Axillary nerve: motor? sensory?
motor: deltoid muscle/flap arm ("do the chicken")

sensory: upper lateral arm
Radial nerve: motor? sensory?
motor: triceps (extend forearm), supinator and extensors of the forearm (including wrist and elbow)

sensory: posterior arm and forearm, thumb and dorsal surface of hand
Nerve that goes behind the humerus (is well protected)?
Radial nerve.
Median nerve: motor? sensory?
motor: flexion of the wrist is primary motor sign. (also pronator muscles of forearm)

sensory: palmar surface of hand, index and middle fingers
Which nerves innervate the forearm?
Musculocutaneous
Radial
Median
Which sensory nerve(s) innervate the hand/fingers (not including wrist/forearm)?
Median (palmar surface of hand, index and middle fingers)
Ulnar (little finger and ring finger)
Radial (thumb and dorsal surface of hand)
Ulnar nerve: motor? sensory?
motor: flexor carpi ulnaris (abduct fingers)

sensory: little finger and medial ring finger
Which motor nerve(s) innervate(s) the hand/fingers (not including wrist/forearm)?
ulnar (abduct fingers)
primary nerves of the lumbar plexus?
L2
L3
L4
Lateral femoral cutaneous nerve contributors
L2
L3
Femoral nerve contributors
L2
L3
L4
Obturator nerve contributors
L2
L3
L4
Sciatic nerve contributors
L4
L5
S1
S2
S3
Femoral nerve splits to become _____ nerve
Saphenous
Sciatic nerve splits to become ____ and ____ nerves
Common peroneal
Tibial
Common peroneal and tibial nerves contribute to this nerve
sural
besides contributing to sural nerve, common peroneal splits to form these nerves
superficial peroneal
deep peroneal
contributors of sciatic plexus
L4
L5
S1
S2
S3
which nerve of the lower body has sensory function only?
lateral femoral cutaneous
Lateral femoral cutaneous: sensory? motor?
sensory: skin over anterolateral aspect of the thigh

motor: no motor innervation
Femoral nerve: location? sensory? motor?
1-2 cm lateral to the femoral artery (NAVy from lateral aspect to medial)
sensory: anterior thigh and knee (terminates as saphenous nerve, which innervates the medial side of the calf down to the ankle)

motor: extension of the lower extremity (use of quadriceps mucle)
Obturator nerve: sensory? motor?
sensory: lower portion of the inner thigh

motor: adductor muscles of leg
Sciatic nerve: sensory? motor?
(sciatic splits to tibial and peroneal)

sensory: posterior aspect of thigh; entire foot

motor: "tippy toes" (tibial)
pull toes up (peroneal)
Tibial nerve motor function?
"tippy toes"/"push down on the gas"
what might you see if the peroneal nerve is injured?
foot drop
Peroneal nerve motor function?
pull toes up
what are the five terminal nerves of the arm?
musculocutaneous
axillary
radial
median
ulnar
wrist: nerve for flexion? nerve for extension?
flexion of wrist: median
extension of wrist: radial