Textbook Notes (381,222)
CA (168,408)
UTSC (19,325)
Psychology (10,054)
PSYA01H3 (1,329)
Steve Joordens (1,150)
Chapter 2

PSYA01 chapter 2 notes

7 Pages
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Department
Psychology
Course Code
PSYA01H3
Professor
Steve Joordens

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Psychology Chapter 4
Biology of Behavior
The Brain and its Components
Donald Hebb provided the foundation for a better understanding of the brain
oExplained how individual nerve cells are organized into larger units
oShowed how brain functioning could be understood in terms of both the
individual cells and the larder networks they comprised
Structure of the Nervous System
Brain has three major functions
oControlling behavior
oProcessing and retaining the information we receive from the environment
oRegulating the bodys physiological processes
Nervous system consists of 2 divisions
oCentral nervous system brain and the spinal cord
Spinal cords contains circuits of nerve cells that control some simple
reflexes such as automatically pulling away from a painfully hot object
Communicates with the rest of the body through nerves
Nerves bundle of fibres that transmits information between
the central nervous system and the body’s sense organs,
muscles and glands
oPeripheral nervous system cranial and spinal nerves
Part of the nervous system peripheral to the brain and spinal cord
Sensory information (what is happening in the environment/body) id
conveyed from sensory organs to the brain and spinal cord
Information from the head and neck region reaches the brain through
the cranial nerves
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Cranial nerves bundle of fibres attached to the base of the
brain
oConveys sensory information from the face and head
and carries messages to muscles and glands
Sensory information from the rest of the body reaches the spinal cord
through the spinal nerves
Spinal nerves bundle of nerve fibres attaches to the spinal
cord
oConveys sensory information from the body and carries
messages to the muscles and glands
Brain has three major parts
oBrain stem includes the medulla, pons, and midbrain
Corresponds basic functions
Primary control of physiological functions and automatic
behaviors
oCerebellum pair of hemispheres resembling the cerebral hemispheres but
much smaller and lying beneath and in back of them
Controls posture and movements, especially rapid ones
oCerebral hemisphere largest part of the brain
Covered by the cerebral cortex and containing parts of the brain that
evolved most recently
Brain is protected by the skull and the spinal cords run through the vertebrae
Meninges three-layered set of membranes that enclose the brain and spinal cord
Cerebrospinal fluid (CSF) the liquid in which the brain and spinal cord float;
provides a shock-absorbing cushion
Blood-brain barrier barrier between the blood and the brain produced by the bells
in the walls of the brains capillaries
oPrevents some substances from passing from the blood into the brain
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Description
Psychology Chapter 4 Biology of Behavior The Brain and its Components Donald Hebb provided the foundation for a better understanding of the brain o Explained how individual nerve cells are organized into larger units o Showed how brain functioning could be understood in terms of both the individual cells and the larder networks they comprised Structure of the Nervous System Brain has three major functions o Controlling behavior o Processing and retaining the information we receive from the environment o Regulating the bodys physiological processes Nervous system consists of 2 divisions o Central nervous system brain and the spinal cord Spinal cords contains circuits of nerve cells that control some simple reflexes such as automatically pulling away from a painfully hot object Communicates with the rest of the body through nerves Nerves bundle of fibres that transmits information between the central nervous system and the bodys sense organs, muscles and glands o Peripheral nervous system cranial and spinal nerves Part of the nervous system peripheral to the brain and spinal cord Sensory information (what is happening in the environmentbody) id conveyed from sensory organs to the brain and spinal cord Information from the head and neck region reaches the brain through the cranial nerves www.notesolution.com
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