Spinal chord Flashcards
which part of the spinal chord is grey matter
the middle region
which part of spinal chord is made of white matter
the outside region
where does sensory information arrive in the spinal chord
in the dorsal horn
where does sensory information exit the spinal chord
via the ventral horn
what type of information comes into the spinal grey
pain, temp, fine touch, vibration, proprioception
stimulation of motor neurons in the spinal chord cause what
movement
what is somatopy
the point for point correspondence of an area of the body to a point on the CNS
what are the two lateral descending tracts
corticospinal and rubrospinal
what are the two medial descending tracts
vestibulospinal and reticulospinal
what do corticospinal fibers control
control every part of the body, solely responsible for finger movement
what does rubrospinal tract do
influence lateral musculature
what do vestibulospinal tracts fo
aid with external distrubtions
what does reticulospinal tract do
aid with internal distrubtions
what does the medial system do
influence medial musculature and liked to posture movements
ascending - dorsal column pathway
carries sensory info from the joint and skin about fine touch and vibration
ascending - spinothalamic pathway
conveys crude touch, pain, temp
how many pairs of spinal nerves are there
there are 31 pairs of spinal nerves each serving different parts of the spine
what are dermatomes
area of skin supplied by nerves from a single spinal root
what is 2 point discrimination
ability to discern two nearby objects touching them, reflecting how sensitive the area is
what are motor pools
all motor neurons in a single muscle collected
what are spinal enlargements
highly innovated, high density sensory receptors and used muscles have enlarged
