Class Notes (837,435)
Canada (510,273)
Psychology (1,556)
PSYC 100 (245)
Lecture 4

PSYC 100 SFU LECTURE 4 THE BRAIN.docx

5 Pages
367 Views
Unlock Document

Department
Psychology
Course
PSYC 100
Professor
Sherri Atwood
Semester
Fall

Description
1 The Brain NEUROIMAGING TECHNIQUES: MRI, CT scan, and fMRI focus on brain structure PET scan and fMRI focus on function of the brain EEG((electroencephalogram)) records electrical waves sweeping across the brain's surface – useful for studying seizures and sleep PET ((position emission tomography)) scan shows which parts of the brain are active while the brain performs a given task – does this by tracing where a radioactive form of glucose goes MRI ((magnetic resonance imaging)) makes images from signals produced by brain tissue after magnets align the spin of atoms fMRI reveals brain activity and function – also shows changes in the level of oxygen blood flow in the brain BRAIN HIERARCHY: recently developed structures sit on the top of structures of the past core: breathing and heart rate newer systems: complex functions like thinking, reasoning, emotions AREAS OF THE BRAIN AND THEIR FUNCTIONS: hindbrain: brainstem and cerebellum ◦  coordinates the body midbrain: the limbic system ◦  manages emotions, and connects thought to body ◦  sensory portion of midbrain has centers for hearing and seeing ◦  involved in vision and hearing, so has sensory and motor neurons ◦  its motor neurons control eye movement forebrain: cerebral cortex ((outer covering)) ◦  integrates information ◦  parts are cerebrum, limbic system, thalamus, hypothalamus CEREBRAL CORTEX: ◦  outer covering of two hemispheres of the brain ◦  highest level of the brain ◦  responsible for most complex aspects of perception, emotion, movement, and thought ◦  ultimate control and information-processing center 2 The Brain CORPUS CALLOSUM: ◦  axon fibres connecting the two cerebral hemispheres OCCIPITAL LOBE: ◦  visual information ◦  vision signals are processed here PARIETAL LOBE: ◦  information about touch ◦  sensations like pressure, pain, touch, temperature ◦  has somatosensory cortex ◦  attention and mental operations; manages input from multiple senses ◦  performs spatial and mathematical reasoning ◦  monitors the sensation of movement TEMPORAL LOBE: ◦  hearing, language; auditory information is sent here; manages sensory input related to sound, which helps the understand of spoken words ◦  has auditory cortex and Wernicke's area ((left hemisphere)) ◦  memory, perception, emotion ◦  gives you the ability to recognize specific faces FRONTAL LOBE: ◦  planning, judgement, memory, reasoning, abstract thinking, movement ◦  inhibition of impulses ◦  active in use of working memory and the processing of new memories ◦  includes motor cortex and Broca's area ((left hemisphere, language)) ◦  motor functions, speech, emotions, creative thinking LESS COMPLEX BRAIN STRUCTURES: BRAINSTEM: MEDULLA: ◦  responsible for autonomic functions like breathing and heart rate ((giraffe structure)) PONS: ◦  its neurons regulate sleep; involved in dreaming ◦  its motor neurons control muscles and glands of the face and neck ◦  helps control respiration, vital functions ((swallowing, bladder function, hearing, equilibrium, taste, eye movement, facial expressions, facial sensation and posture)) ◦  acts as a bridge between higher and lower levels of the nervous system ◦  helps coordinate automatic and unconscious movements 3 The Brain DAMAGE TO THE BRAIN STEM CAN RESULT IN DEATH RETICULAR ACTIVATING SYSTEM ((RAS)): ◦  extends from brain stem; arouses cortex and screens incoming information ◦  reticular formation ◦  filters incoming sensory information ◦  nerve network in the brainstem ◦  enables alertness, from coma to wide awake ◦  regulates sleep, wakefulness, and levels of arousal THALAMUS: ◦  "sensory switchboard" or "router"
More Less

Related notes for PSYC 100

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