Review of Brachial and Lumbosacral plexus Flashcards
Lateral and medial cord nerves will innervate?
anterior compartment
Posterior cord nerves will innervate?
the posterior arm compartment
Musculocutaneous n?
innervates all m in anterior compartment of the arm
coracobrachialis, biceps brachii, brachialis
supplies most flexors in arm
carries sensory information from the lateral forearm
Anterior compartment of the forearm and hand?
anterior forearm is mainly median, does some in hand
hand is mostly ulnar and 1 and 1/2 m in forearm
Median nerve?
innervate most of the anterior forearm
supplies most flexors in forearm
hand- 1st and 2nd lumbricals, abductor pollicis brevis, opponens pollicis, flexor pollicis brevis (recurrent branch of median nerve)
sensory info from the palmar aspect of digits 1-3 the lateral 1/2 of the 4th digit
Ulnar nerve?
supplies most intrinsic hand muscles
forearm: flexor carpi ulnaris, 1/2 of flexor digitorim profundus
ulnar nerve carries sensory information from the palmar and dorsal aspects of the 5th digit and the ulnar 1/2 of the 4th digit
Axillary nerve?
deltoid and teres minor
sensory info from lateral shouldar
radial nerve?
all muscles of the posterior arm
triceps brachii, anconeus
supplies extensors in the arm
supplies all extensors in the forearm
sensory from posterior arm and posterior forearm
Radial nerve injury?
wrist drop
damage in arm vs cubital fossa
damage to superficial branch vs deep branch
ulnar nerve injury?
claw hand
damage in wrist vs forearm
median nerve injury?
carpal tunnel syndrome
distribution of motor damage involving the intrinsic hand muscles
axillary nerve injury?
prone to injury with damage to surgical neck of humerus
deltoid and teres minor knocked out, anesthesia on upper lateral arm
clinical appearance of Erb-Duchenne palsy?
paralysis of muscles of the shoulder and arm supplied by C5-C6
upper limb adducted shoulder, medially rotated arm, and extended elbow
lateral aspect of upper arm also experiences loss of sensation
Klumpke paralysis?
short muscles of the hand are affected and a claw hand forms
what goes through the carpal tunnel?
median nerve
flexor digitiorum profundus
flexor digitorum superficialis
flexor pollicis longus
Ulnar nerve injury?
most common place is posterior to the medial epicondyle of the humerus
wrist adduction is impaired
hard to make a fist (cannot flex 4th and 5th digits), claw hand
if ulnar injury is in wrist what difference symptoms would you see?
would still be able to flex 4th and 5th digits but have sensory loss
Ulnar vs Klumpke?
ulnar is last 2 fingers, klumpke is 2-5 fingers cant flex
Winged scapula is damage to what nerve?
long thoracic nerve
Crutch palsy?
compression in axillary region
can put pressure on posterior cord
(axillary and radial)
Lumbosacral plexus anterior vs posterior?
L1-S4
anterior divisions go to flexors
posterior divisions go to extensors
Femoral nerve?
posterior division L2-L4
motor innervation to anterior thigh muscles (extensors)
rectus femoris, vastus, iliopsoas, pectineus, sartorius
Obturator nerve?
anterior division L2-L4
motor innervation to medial thigh (adducter muscles)
adductors, gracilis, obturator externus
Superior and inferior gluteal nerves?
posterior division of L4-S1
motor innervation
superior- gluteus medius, minimus, tensor fasciae latae
inferior- gluteus max
Sciatic nerve?
L4-S3
anterior (Tibial nerve)
Posterior (common fibular)
Tibial nerve?
anterior division of sciatic nerve
motor innervation to posterior nerve (flexors)
Common fibular nerve?
posterior division of sciatic nerve
motor innervation to anterior and lateral leg
anterior-deep fibular n, extensors
lateral leg- superficial tibial n
Damage to tibial nerve?
loss of plantarflexion, toe flexion
Damage to common fibular nerve?
foot drop
injury to sciatic nerve?
loss of plantarflexion, toe flexion
foot drop
plus problems with thigh extension and leg flexion
