spinal nerves

where and what do intercostal nerves innervate

spinal nerves travel b/w ribs
innervation: motor and sensory axons innervate muscles and skin of the trunk

what are the 3 spinal nerve plexuses

cervical, brachial, lumbosacral

what do cervical plexus innervate

neck

what do brachial plexus innervate 

pectoral girdle and upper limbs 

what do lumbosacral plexus innervate

pelvic girdle and lower limbs

what is a plexus

interwoven mesh of axons

what nerves make up of brachial plexus

musculocutaneous, median, ulnar, axillary, radial

what do musculocutaneous innervate and examples 

sensory: anterior forearm
motor: anterior arm
examples are anterior forearm - brachialis, coracobrachialis, biceps brachii

what do median nerves innervate and examples

sensory: hand
motor: most muscles of anterior forearm
examples are most muscles of anterior forearm - flexor pollicis and carpi muscles and pronator teres

what do ulnar nerves innervate and examples

sensory: hand

motor: most muscles of hand
examples are flexor digitorum and carpi muscles

what do axillary nerves innervate and examples

sensory: shoulder

motor: shoulder 

examples is deltoid 

what do radial nerves innervate and examples 

sensory: posterior arm, forearm and hand 

motor: posterior arm and forearm 

examples are triceps brachii, supinator, extensor carpi muscles 

where are intercostal nerves an what do they innervate 

spinal nerves that travel between ribs

innervate trunk 

what nerves make up lumbosacral plexus nerves

femoral, obturator and sciatic nerves

what does femoral nerve innervate and examples

innervate anterior thigh

sartorius and quadricep

what does obturator nerve innervate and examples

innervate medial thigh

gracilis and adductor muscles

what does sciatic nerve innervate and examples

posterior thigh, all leg and all foot 

hamstrings and gastrocnemius

what do the sciatic nerve split into

tibial nerve and fibular nerve