Topic 13: Spinal Nerves Flashcards
component of sensory nerves that contain sensory fibers
dorsal root
location of cell bodies of spinal nerves
dorsal root ganglia
component of sensory nerves that contains the motor fibers arising from anterior (ventral) gray column
ventral root
two branches of spinal nerves
dorsal ramus
ventral ramus
branch of spinal nerve that innervate the back
dorsal rami
branch of spinal nerve that innervate the thoracic wall
ventral rami
in thorax, ventral ramus continues as _______
intercostal nerve
2 branches of intercostal nerve
lateral and anterior cutaneous branches
network of nerves formed by ventral rami from peripheral nerves (except T2-T12)
Nerve Plexus
Most important nerve of the cervical plexus and innervates the mediastinal pleura, pericardium and diaphragm
Phrenic nerve
main branch of the lateral cord of brachial plexus
musculocutaneous nerve
originates from both lateral and medial cords of brachial plexus
median nerve
branches from the medial cord of brachial plexus
ulnar nerve
musculocutaneous nerve innervates which muscles?
anterior arm biceps, brachii, and brachoalis & sensory dermis of part of forearm
median nerve innervates which muscles?
anterior forearm muscles, lumbrical muscles to digits 2&3, thenar muscles and sensory dermis of lateral palm