Textbook Notes (368,318)
Canada (161,798)
Psychology (9,695)
PSYA01H3 (1,206)
Steve Joordens (1,058)
Chapter 4

Chapter 4 study guide

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Steve Joordens

Chapter 4: Biology of Behaviour The Brain and Its Components - Structure of the Nervous System o Brain has three main functions: Controlling behaviour Processing and retaining the information we receive from the environment regulating the bodys physiological process o the brain receives information from the bodys sense receptors, and it must be connected with the muscles and glands of the body o the nervous system has two divisions: the central nervous system: the brain and the spinal cord spinal cord has a circuit of nerve cells that control simple reflexes the peripheral nervous system: nerves which are attached to the spinal cord and to the base of the brain sensory information from what is happening in the environment or within the body is conveyed from sensory organs to the brain and spinal cord info from the head and neck reach through the cranial nerves info from the rest of the body reaches through the spinal nerves o human brain has three main parts: brain stem one of the most primitive regions of the brain functions: control of physiological functions and automatic behaviours cerebellum attached to the back of the brain stem looks like a mini cerebral hemisphere function: to control and coordinate movements www.notesolution.com cerebral hemispheres largest part of the brain contains the parts of the brain that evolved most recently o brain is encased in a skill and the spinal cord runs through the middle of a column of hollow bones known as vertebrae o both the brain and spinal cord are enclosed by a three layer set of membranes called meninges there is a clear liquid called cerebrospinal fluid that flows between the meninges so the brain and spinal cord can get in contact with the bones of the skull and vertebrae o the surface of the cerebral hemispheres is covered by the cerebral cortex thin layer of tissue approx. 3 mm thick often referred to as grey matter (because of appearance) the nerve cells in the cerebral cortex are connected by a layer of nerve fibres called white matter very wrinkled and full of bulges and grooves bulges are called gyri grooves called fissures o the peripheral nervous system consists of nerves that connect to the central nervous system nerves carry both incoming and outgoing information sense organs detect changes in the environment and send signals through the nerves to the central nervous system brain sends signals through the nerves to the muscles and the glands producing adjustments in internal physiological processes - Cells of the Nervous System o Neurons (nerve cells) are the elements of the nervous system that bring sensory information to the brain, store memories, reach decisions, and control the activity of the muscles. www.notesolution.com
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