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Reticular System
Reticular System-Neuro test 2
Question | Answer |
---|---|
Reticular Formation runs through the central core of what 3 structures? | 1. Medulla 2. Pons 3. Midbrain |
It consists of loosely clustered neurons in _______ ______. | White Matter |
Forms __ Columns. | 3 |
Name the 3 columns formed by reticular formations | Raphe Nuclei (MIDLINE) Group of Nuclei (MEDIAL & LATERAL)-- Laterally on each side of Raphe Nuclei. These run the length of the brainstem |
Because of their long branching axons, _______ reticular neurons project to ________ _______ _______. | 1. Singular 2. Widely separated regions |
These singular reticular neurons project to where? | 1. Thalamus 2. Cerebellum 3. Spinal Cord **This makes reticular neurons ideal for governing the arousal of the brain as a WHOLE ** |
Certain reticular neurons send a continuous stream of impulses to the ________ through _____________________. | 1. Cerebrum 2. Relays in the thalamus |
This maintains the cerebral cortex in an alert, conscious state | Reticular Activating System (RAS) |
What is the function of the RAC? (Reticular Activating System) | - Maintain consciousness + alertness - Functions in sleep + arousal in sleep |
Axons from all great ascending _______ tracts ______ on RAS neurons. | 1. Sensory Tracts 2. Synapse |
The synapses between the axons and RAS neurons keep the reticular neurons ______ & enhances their arousing affect on the _________. | 1. Active 2. Cerebrum |
Stimuli that keeps us awake and mentally alert | - Visual - Auditory - Touch |
Reticular Formation has a _________ _______. | Motor Division |
The motor division sends axons to the ______ _____. | Spinal Cord |
These axons of the motor division control what? | - Control of skeletal muscles during coarse movements of the limbs - Some regulate visceral functions (Heart rate, BP, respiration) |