Origin - dorsal horn

termination - Medulla and pons near long, descending fibers

function- mod of pain, temp, and related sesnory signal to cortex

Auditory Relay

Origin- Cochlear nuclei, SON, Inf colliculus

Termination- Midbrain and Pons

Vestibular Nuclei

Origin - Vestibular Nuclei

Termination - Lat 1/3 of Ret Form. of medulla and caudal pons

Origin- solitary nucleus

Terminate - lateral 1/3 of reticular formation of medulla and cadual pons

Origin - spinal and main sensory nucle of trigem nerve

Term- Lat 1/3 of medulla and pons

Visual Inputs

Origin - Sup Colliculus

Term - Lat 1/3 of midbrain

Function - Mod visual signal to cortex; mod visual tracking responses and postural adjustments at the level of the spinal cord

Origin- Amygdala, hippocampus, and septal area

Termination- Midbrain and PAG

Origin- afferent fibers from CN IX and X

Term - Solitary nucleus (medulla and pons)

Function - Modify CV functions and resp signals to effector regions of the medulla

Origin - Lat and Med hypothalamus

Term - midbrain PAG and locus ceruleus (pons)

Function - higher order regulation of autonomic, visceral, and emotional responses

Origin - Amygdala, hippocampus, Septal area

Term - midbrain PAG and solitary nucleus

Function- relay olfactory signals to the retic formation;

higher order reg of autonomic, visceral, and emotional behavior

Origin- Sensorimotor cortex

Term- Pons and Medulla near long descending fibrs

Regulate voluntary mechanisms (posutre and muscle tone); regulate automatic response mechanisms of the retic formation

Cerebellum

Origin - Fastigial Nucleus

Term- Pons and Medulla near long desc. fibres

Feedback mechanism for posture and tone