anat 2 test nervous system Flashcards
(81 cards)
what are the 2 main divisions of the nervous system
somatic and autonomic
in the CNS, -somas consist of
grey matter and nucleus cortex
in the CNS, -axons consist of
white matter
faniculo
fasciculus
lemniscus
peduncle
fibers
in PSNS, -somas consist of
ganglion
in PSNS, -axons consist of
nerve, root, trunk, branch
in embryonic development, what did the ectoderm develop into
neural tissue
epidermis
in embryonic development, what did the mesoderm develop into
somites [which differentiate into skeletal and muscle tissues]
notochord
blood vessels
dermis
connective tissue
in embryonic development, what did the endoderm develop into
epithelium of digestive and respiratory systems
digestive organs [liver and pancreas]
what is the pyramidal decussation
cranial end between spinal cord and brainstem
what is intumescentiae
the segments that gives origin to the nerves that supply the thoracic and pelvic limbs
what is the cervical inumescence
C6-T2, innervates thoracic limbs [don’t forget C8]
what is the lumbar intumescence
L4-S3, innervated pelvic limbs
what is a funiculi composed of
descending and ascending axon fibers
What is the segment of the cervical functional region of the spinal cord
C1-C5
What is the segment of the cervical intumescence functional region of the spinal cord
C6-T2 [plus C8]
What is the segment for the thoracolumbar functional region of the spinal cord
T3-L3
What is the segment for the lumbar intumescence functional region of the spinal cord
L4-S3
What is the segment for the caudal functional region of the spinal cord
Cd 1-5
in what direction does sensory or afferent information run
from body towards CNS
in what direction does motor or efferent information run
towards muscle or glands
what is UMN
central motor neuron
what is LMN
peripheral motor neuron
what are the 3 parts of a reflex
sensory input
central connection
output
what does the sensory input portion of a reflex consist of
afferent neuron [peripheral receptor]