Textbook Notes (368,629)
Canada (162,027)
Psychology (1,468)
PSYCH 2AA3 (70)
Chapter 4

Chapter 4 Textbook readings.docx

2 Pages
130 Views
Unlock Document

Department
Psychology
Course
PSYCH 2AA3
Professor
Jennifer Ostovich
Semester
Fall

Description
Module 4.3: Neural Development The Developing Nervous System Organization of the Mature Brain  The basic unit of the brain and the rest of the nervous system is the neuron, a cell that specializes in receiving and transmitting information  The cell body at the center of the neuron contains the basic biological machinery that keeps the neuron alive  The receiving end of the neuron, the dendrite, looks like a tree with many branches  can receive input from 1000’s of neurons  The slender elongated structure at the other end of the cell body is the axon which sends info to the other neurons  Axon is wrapped in myelin a fatty sheath that allows it to transmit info more rapidly  At end of axon are terminal buttons release neurotransmitters and carry info to nearby neurons  Gap b/w one neuron and the next is called synapse  The wrinkled surface of the brain is cerebral cortex, made up of about 10 billion neurons  consists of right and left halves (hemispheres) which are linked by millions of axons in a thick bundle called corpus callosum  Frontal cortex  your personality and ability to make and carry out plans The Developing Brain  Emerging Brain Structures  At about 3 weeks after conception neural plate forms  @ 4 weeks folds and forms neural tube which eventually becomes brain and spinal cord  Nerve production begins 10 weeks after conception and at 28 weeks, will have all neurons that it will ever have (4000/second)  Brain is built in stages- beginning with innermost layers  Neurons migrate to their final location in the brain by wrapping themselves around supporting cells  In fourth month of prenatal development, axons begin to acquire myelin process continues through infancy to adolescence  Sensory first to get myelin, cortex last  After birth, brain grows rapidly  like a growing tree with roots  Dendrite increase as well as synapses reaching peak number at first birthday  Synapses begin to disappear gradually  synaptic pruning. Synapses that are active are preserved, inactive are eliminated  Pruning completed first for sensory and motor functions followed by language and spatial skills, then attention and planning  Structure and Function  Studies of children with brain damage: if a region of the brain is regulates a particular function, then the damaged region should impair the function
More Less

Related notes for PSYCH 2AA3

Log In


OR

Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


OR

By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.


Submit