Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Neuro: 1-Reticular
USCSOM: Neuroanatomy: 1-Reticular Formation
| Question | Answer |
|---|---|
| What are the 3 zones of the RF? | Midline, Medial, Lateral |
| Describe the midline zone. | called the "raphe"; neurotransmitter is serotonin |
| Describe the medial zone. | outputs of the RF; large neurons |
| Describe the lateral zone. | projects axons to the medial zone; small cells |
| What is the normal neurotransmitter in the RF neuron? | ACh |
| What are the 3 general functions of the RF? | Motor fxn, Visceral fxn, Consciousness |
| Where is the origin of the reticulospinal tract? | medial zone of RF; pons and medulla |
| What is the course of the reticulospinal tract? | ventral and lateral funiculi of spinal cord |
| What is the termination of the reticulospinal tract? | mostly ipsilateral; medial ventral horn and intermediate gray |
| What are 2 fxns of the reticulospinal tract? | maintain posture; produce gross body movements |
| What kind of signals are in visceral center projections to the spinal cord? | preganglionic symp and parasymp |
| What kind of signals are sent to the brainstem from the visceral centers? | GVE and SVE nuclei of cranial nerves |
| What is the most important clinical function of the RF? | regulation of sonsciousness |
| What is the ARAS? | ascending reticular activating system |
| What is the origin of the reticulothalamic tract? | medial zone of the RF |
| What is the course of the reticulothalamic tract? | central tegmental tract CTT |
| What is the termination of the reticulothalamic tract? | intralaminar nuclei of the thalamus |
| What tract gives widespread activation of the cortex? | thalamocortical projections |
| What activates ARAS? | somatosensory from lateral spinothalamic tract; visual, auditory, visceral |
| What are some causes of lesions in the RF? | vascular lesions/tumors in brain stem; uncal herniation; tonsilar herniation |
| What are some signs of lesions to the RF? | disturbances of consciousness; changes in mm tone and postural reflexes; visceral dysfunction to cardio/respiratory |
| What are the 3 monoaminergic systems found in the RF? | serotonin, NE, Dopamine |
| What are the ascending and descending fxns of the serotonergic pathway? | desc: pain inhibition; asc; sleep and mood |
| Where does the serotonergic pathway originate? | midline raphe |
| Where do the serotonergic neurons project to? | cerebral hemisphere (sleep/mood); spinal cord (analgesia) |
| What are the fxns of the ascending NorEpi pathways? | mood, attention, memory |
| Where does the NorEpi pathway originate from? | locus ceruleus in upper pons |
| Where do the dopaminergic neurons originate? | substantia nigra and ventral tegmental area |
| Where does the substantia nigra project to? | caudate and putamen |
| Where does the ventral tegmental area project to? | forebrain areas; amygdala, prefrontal cortex, nucleus accumbens |
| Excess dopamine release in prefrontal cortex and amygdala is associated with what disorder? | schizophrenia |
| What are the two pathways and associated fxns with the dopaminergic pathways | nigrostriatal: motor; mesolimbic: behavior and emotion |
Created by:
jlellerm
Popular Anatomy sets