22: Sensory Pathways Flashcards
Anterior fissure & posterior sulcus
helpes seperate the spinal cord into two halves
Gray Commissure
forms a comunication link between the two halfs, a narrow band of gray matter
central canal
continues with the ventricles cavities of the brain is found in the gray commissure
motor neurons and interneurons
heavily concentrated in the central portion of the spinal cord, causing the look of gray matter
sensory nuerons
cell bodies in the dorsal root ganglion
horns
gray matter portions of the cord , named by location are, (anterior, posterior, and lateral)
white matter
the nerve fibers of the bundles are myelinated for rapid conduction and therefore appear as this
nerve colums
the fiber bundles are referred to as this, named for location, (anterior posterior, lateral)
tracts
within the colums are these bundles of nerve fibers,
spinothalamic tract
acending tract sensory
corticospinal tract
decending tract motor
ventral root
carries motor information
dorsal root
is sensory
dorsal column-medial lemniscal
assending tract that carrys surface receptor impulses
anterolateral
assending tract that carrys surface receptor impulses
cerebral cortex
converting the cerebrum , a layer of gray matter
central sulcus
runs from medial to lateral across each hemishpere
gyrus
each convolution (raised area) of the cortex is this
post central gyrus
area behind the central sulcus
somatic sensory area
post central gyrus is this of the cortex
proprioception
a sense that requires very rapid transmission of afferent info, the ability to sense the tension and position of the muscles
fast pain
sharp, felt quickly
slow pain
aching, requires time
