Flashcards in Sensory systems III Deck (8)
what modalities are transmitted by the paleospinothalamic tract?
slow, dull, poorly-localized pain sensation
what type of peripheral nerve fibers are associated with the paleospinothalamic tract?
C fibers - nonmyelinated
where do the axons of second order neurons in the paleospinothalamic tract terminate?
reticular formation - medulla, pons, midbrain
where does the spinomesencephalic tract terminate? what is its function?
1. PAG, midbrain raphe nuclei 2. modulate transmission of nociception
where does the spinotectal tract terminate? what is its function?
1. superior colliculus 2. causes reflex turning of the head, eyes, and trunk in direction of noxious stimulus
where does the spinohypothalamic tract terminate? what is its function?
1. hypothalamus 2. autonomic and reflex responses to noxious stimuli
is the spinothalamic tract a crossed tract?