Describe the structure and functions of the limbic system and the reticular activating system

Describe the structure and functions of the limbic system and the reticular activating system

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Describe the structure and functions of the limbic system and the reticular activating system. LIMBIC SYSTEM is spread widely throughout the forebrain. This system is our emotional, or affective (feeling) brain. Extensive connections between the limbic system and lower and higher brain regions allow the system to integrate and respond to a wide variety of environmental stimuli. The hypothalamus is the neural clearinghouse for autonomic and emotional responses. It is the reason why acute stress causes visceral illnesses (ulcers, hypertension, etc). The most severe consequence of severe emotional distress is cardiac arrest. The links with the cerebral cortex help explain why emotion sometimes overrides thoughts and why reason can stop us from inappropriate expression of emotion. RETICULAR SYSTEM: Extends through brainstem; governs arousal of brain as a whole. Certain fibers maintain cortex in an alert, conscious state (the reticular activating system). The RAS appears to act as a filter for the flood of sensory input. Repetitive, familiar or weak signals
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This note was uploaded on 11/22/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Describe the structure and functions of the limbic system and the reticular activating system

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