Textbook Notes (363,140)
Canada (158,217)
Psychology (9,573)
PSYA01H3 (1,196)
Steve Joordens (1,052)
Chapter 4

Chapter 4

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University of Toronto Scarborough
Steve Joordens

1. The Biology of Behaviour 2. To an extend the bodies behaviour is controlled by a central organ (brain) The brain has a primitive part that focuses on keeping us alive but also has a part that is more modern trying to help us with success The Brain and its components Action potential- basic ways messages are sent in the brain Electrical currents cause the animations of the brain But its actually more electrochemical Central nervous system- brain and spinal cord Peripheral nervous systems- nerves Reflexive behaviour are not very thought out- example quick reflex of escaping heat and being burned or any form of escaping pain. Brain Stem, Cerebellum, and the different hemispheres. The brain is a critical organ and thats why it is protected by the skull. The brain has no pain sensors, therefore you can not feel any sensation when it is touched. Meninges protect the brain, similar to the pads in a football helmet Knockouts- brain shuts down due to the brain coming into contact with the skull White matter inside brain is mainly for structure in the brain Brain matter is where the complex neural signals are sent and the complex brain process is done Due to the folds and fishers of the brain you can get more surface area and more brain matter into a smaller spot The peripheral nervous system takes commands from the central nervous system and delivers them throughout the body such as moving your hand or walking. Somatic nervous system- controls the goal driven or will driven commands Autonomic Nervous Systems- controls the automatic commands- also controls the organs and the general working condition of the body Two parts to the Autonomic system- sympathetic and parasympathetic Parasympathetic is when your body is relaxed, heart rate is normal blood pressure is normal Sympathetic is when your respiration increases, your heart beats faster, pumps blood to muscle, prepares your body for action 4 Fs of the sympathetic mode- Feeding, fighting, fleeing and Fucking Sympathetic nervous system kicks in involuntarily , and is very automatic, and very quick Same as the Parasympathetic mode, you cant just calm yourself right down That is why they both fall under the Autonomic System Both the ANS and SNS send muscles and battle for command of the body, and usually the SNS will win because it is the controlled system Cells of the Nervous System Nerve cells- long chain of cells to pass signals from brain to muscle Passed along thanks to chemicals Large bulbous end (soma) that had numerous tree like structures (dendrites) coming out of it, www.notesolution.com
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