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Ch 15- Spinal Cord
Terms in this set (53)
What is a bundle of nerve fibers that connects to the spinal cord?
What controls motor impulses?
What controls sensory impulses?
What is a bundle of nerve fibers that connect to the brainstem and thalamus?
How many cranial nerves are there?
The dorsal root of the spinal nerve is totally_______
The ventral root of the spinal nerve is totally_______
What two types of matter are in the spinal cord?
White and gray
What are the three functions of the spinal cord?
conduction, reflexes, motion/locomotion
What is bundles of fibers passing information up and down the spinal cord?
What are involuntary, stereotyped responses to stimuli?
What is the repetitive, coordinated actions of several muscle groups (ex. generation of patterns needed for walking)?
What tracts conduct sensory impulses to the brain?
What tracts control voluntary movement?
What controls voluntary actions?
What controls involuntary actions?
How many nerves does one vertebrae get?
In what directions do the spinal nerves branch?
posterior and anterior
What do the visceral branches (sympathetic rami) do?
innervates visceral organs ( autonomic nervous response)
What do adjacent nerves combine to form?
What is the important nerve in the cervical plexus?
What body area is served by the phrenic nerve?
diaphragm; skin and muscles of shoulder and neck
What is the result of damage to the cervical plexus or its nerves?
respiratory paralysis (and death if not treated promptly)
What are the 5 important nerves of the brachial plexus?
axillary, radial, median, musculocutaneous, and ulnar
What body area is served by the axillary nerve?
deltoid muscle and skin of shoulder; muscles and skin of superior thorax
What is the result of damage to the axillary nerve?
paralysis and atrophy of deltoid muscle
What body area is served by the radial nerve?
triceps and extensor muscles of the forearm; skin of posterior upper limb
What is the result of damage to the radial nerve?
wristdrop- inability to extend hand at wrist
What body area is served by the median nerve?
flexor muscles and skin of forearm and some muscles of hand
What is the result of damage to the median nerve?
decreased ability to flex and abduct hand and flex and abduct thumb and index finger- therefore, inability to pick up small objects
What body area is served by the musculocutaneous nerve?
flexor muscles of arm; skin of lateral forearm
What is the result of damage to the musculocutaneous nerve?
decreased ability to flex forearm on arm
What body area is served by the ulnar nerve?
some flexor muscles of forearm; wrist and many hand muscles; skin of hand
What is the result of damage to the ulnar nerve?
claw hand (inability to spread fingers apart)
What are the two important nerves of the lumbar plexus?
femoral and obturator
What body area is served by the femoral nerve?
lower abdomen, anterior and medial thigh muscles (hip flexors and knee extensors, and skin of anteromedial leg and thigh)
What is the result of damage to the femoral nerve?
inability to extend leg and flex hip; loss of cutaneous sensation
What body area is served by the obturator nerve?
adductor muscles of medial thigh and small hip muscles; skin of medial thigh and hip joint
What is the result of damage to the obturator muscle?
inability to adduct the thigh
What are the two important nerves of the sacral plexus?
sciatic and superior and inferior gluteal
What does the sciatic nerve split into?
common fibular and tibial
What body area is served by the sciatic nerve?
lower trunk and posterior surface of thigh (hip extensors and knee flexors)
What is the result of damage to the sciatic nerve?
inability to extend hip and flex knee; sciatica
What body area is served by the common fibular nerve?
lateral aspect of leg and foot
What is the result of damage to the common fibular nerve?
footdrop (inability to dorsiflex foot)
What body area is served by the tibial nerve?
posterior aspect of leg and foot
What is the result of damage to the tibial nerve?
shuffling gait - inability to plantar flex and invert foot
What body area is served by the superior and inferior gluteal nerve?
gluteus muscles of hip
What is the result of damage to the superior and inferior gluteal nerve?
inability to extend hip (maximus) or abduct and medially rotate thigh (medius)
What is it called when an intervertebral disc ruptures and leaks and compresses the spinal nerve?
What happens when there is compression or tearing of the spinal cord?
the nerve are damaged and die
What happens when there is inflammation and calcium in a spinal cord injury?
the neighboring neurons die
How do you limit damage in a spinal cord injury?
give drugs to reduce inflammation and protect neighboring, intact neurons
Recommended textbook explanations
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