The functions of the cerebellum are entirely ______________ and it functions at the unconscious level
Motor
What is areflexia
Loss of efferent component of reflex arc
Where does the vagus enter the medulla
Joins spinal trigeminal tract and synapses in the spinal trigeminal nucleus
lesion of the internal capsule affects CN 11 on which side?
ipsilateral (CNT fibers damaged)
lesion of the internal capsule affects the CST/CNT that project to where mainly?
Contralateral side
What are neuropils
dense network of interwoven nerve fibers & their branches and synapses, together with glial filaments
5HT_3 is related to
Vomiting and is ionotropic
Ascending cholinergic RAS fibers do what to arousal
Increase arousal
The molecular layer of the cerebellum is the
Outermost pale layer that has relatively few cells and lots of cell processes
What causes Ca to influx to allow for exocytosis of NT vesicles
Action potentials reach the synaptic knob and then voltage gated Ca channels open allow Ca into the cell, this Ca causes docking and fusion of vesicles
Lesions of the midbrain involving MLF/trochlear nucleus result in
Contralateral SO muscle paralysis, while other CN lesions affect ipsilateral
Lesion of the trochlear nerve root causes
Paralysis of superior oblique on contralateral side
The inferior salivatory nucleus supplies
Otic ganglion (parotid)
Parasympathetics from CN9 ride on CN11
What structures of the metencephalon give rise to the cerebellum
Cerebellar anlage and the rhombic lip
What do the PPT and LDT do
They are cholinergic areas that affect arousal
They use the dorsal and ventral pathways that the RAS uses
What makes up the BBB
Pericytes, astrocytes, endothelial tight junctions, basal lamina (basement membrane)
Involuntary movements of the eye are controlled by
Occipital eye fields in visual association cortex
The VAC projects corticotectal fibers to the superior colliculus to allow you to follow a target
Histamine is made from what AA
Histidine
