PSYCH101 Lecture Notes - Lecture 11: Transcranial Magnetic Stimulation, Central Nervous System, Magnetic Resonance Imaging

7 views6 pages
1 Aug 2016
Department
Course
Professor
PSYCH 101 – Week Six Notes
How is the nervous system organized?
-Nervous System is organized into a hierarchy:
oCentral Nervous System (CNS)
oPeripheral Nervous System (PNS)
-Structures of the Brain:
oHindbrain/Midbrain/Forebrain
-Localization of Function - Different parts of brain responsible for different
but overlapping tasks.
-Lateralization - Right and left sides of the brain are partly specialized.
What is the somatic nervous system responsible for?
-Voluntary motor actions.
-Connects sensory receptors and skeletal muscles to the CNS (Red Nerve
Pathways).
oEfferent Nerve Fibers - Transmit information from CNS to the
periphery (brain -- muscles).
oAfferent Nerve Fibers - Transmit information from the periphery to
the CNS (Sensory receptors -- Brain).
What is the autonomic nervous system responsible for (3 functions)?
1. Regulates involuntary behaviour - Heart Rate/Digestion.
2. Parasympathetic Division conserves energy - Eating/sleeping.
3. Sympathetic Division mobilizes energy - Working/danger.
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 6 pages and 3 million more documents.

Already have an account? Log in
What does the central nervous system (CNS) entail?
-Brain - Higher order cognitive processes.
oLocalization of Function: different parts of the brain perform different
but overlapping tasks.
-Spinal Cord - Bridge between the brain and PNS; Performs rudimentary
(basic) tasks
oSpinal Reflexes - Automatic responses to environment that require no
higher processing (Ex. Burning hand on pot handle (tells you to let go
after pain is sensed and tissue is damaged)
-Cerebro-spinal Fluid (CSF).
oVentricles - Hollow cavities in brain.
-Braincase and spinal column protect the CNS.
What are the 2 main forms of brain mapping?
1. Computerized Tomography (CT Scan).
2. Magnetic Resonance Imaging (MRI) - Magnetic field used to map the
structure of the brain.
What are 4 examples of ways in which we can map the brain?
1. Transcranial Magnetic Stimulation (TMS) - Magnetic field created to
stimulate neurons and observe their effect.
2. Electroencephalogram (EEG) - Records localized brain activity.
3. Positron-Emission Tomography (PET) - Records biochemical changes in the
brain over time.
oDrink ions to draw more blood to certain part of brain, Radioactive
isotope is released with glucose and that is what scanner picks up
(sounds dangerous but isn’t)
4. fMRI - Records activity in the ENTIRE brain over time.
What role does the occipital role have in imaging?
-Occipital Lobe = Where Visual Cortex is – Not only used for looking at things,
but also imagining things (thinking + analyzing)!
-^Why visual cortex is still extremely active in blind person reading Braille
What does the hindbrain entail (3 parts)?
1. Cerebellum (“Mini Brain”) - Fine-tunes motor movement; learning repeated
motor movement; alcohol.
oCerebellum = 1st section affected with alcohol – Why you slur speech,
e.t.c.
oLooking at evolutionary past – chimpanzees also have cerebellum, but
it is smaller in proportion… Question is “What do humans do that
requires more fine tuning of motor movement?” - Ex. Eye-hand
coordination in sports, Throwing projectile @ target and hitting it
2. Pons - Sleeping, waking, dreaming (Very active when dreaming!)
3. Medulla - Involuntary bodily functions.
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-2 of the document.
Unlock all 6 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Class Notes
Textbook Notes
30 Verified Answers
Study Guides
1 Booster Class