section 7 part 3 Flashcards
where is tbhe substantia nigra found?
in the rostral midbrain adjacent to the crus cerebri
what do the dopaminergic neurons of the substrantia nigra produce?
melanin
where do the dopaminergic neurons of the substantia nigra project to? what do they control?
the striatum
involved in motor control
what does loss of the substantia nigra input to the striatum cause?
parkinsons
what are the mesocrotical & mesolimibic dopaminergic projections related to?
emotion
the projections from the cholinergic neurons at the pons-midbrain junction are important for what?
regulating arousal and sleep-wake cycle
what can result from damage to the cholinergic neurons at the pons-midbrain junction?
coma
what does the basal nucleus of meynert modulate?
cortical function
what type of nucleus is the basal nucleus of meynert?
a large cholinergic nucleus
does the basal nucleus of meynert project directly or indirectly to the cerebral cortex?
directly
where is the basal nucleus of meynert located?
region deep to the base of the olfactory tract and rostral to the optic tract on the inferior surface of the brain
what disease can result if the neurons of the meynert nucleus are lost?
alzheimers
what is a way to check for cranial nerve 4 palsy?
have patient look nasally. if he cannot look down from that position = cranial nerve 4 palsy
what 5 eye muscles does cranial nerve 3 innervate?
- medial rectus
- superior rectus
- inferior rectus
- inferior oblique
- levator palpebae
where do neurons from the edinger-westphal nucleus project to?
the ciliary ganglion
