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Chapter 3-2

Chapter 3-2 CNS PNS web 3pp2.pdf

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Western University
Psychology 1000
Wolfe/ Quinlan

Homecoming September 30 - October 2nd  www.westernhomecoming.uwo.ca Saturday, 1st  9:00 am Parade along Richmond St.  1:00pm Western Mustangs vs York Lions  Tickets at westernmustangstickets.universitytickets.com 2 Today’s Business Student Success Centre Leadership & Mentorship Program (LAMP)  http://success.uwo.ca/  Midterm exam date: October 22 nd at 9am  Makeup date: contact [email protected] Read Chapter 3  Today CNS & PNS- read pages 78-91  Oct. 3 : 3-3 Brain- read until page 97  Oct. 5 : 3-4 Hemispheres- finish chapter 3 1 GPS: Where are we going? From Neurons to Systems Organization of the nervous systems: CNS & PNS  division of labour The Brain  structures and function Biological Foundations of Behaviour 4 Chapter 3 Divisions of the Nervous System Central Nervous System (CNS)  Brain and Spinal Cord  tracts Peripheral Nervous System (PNS)  connects CNS with muscles, glands, and sensory receptors  nerves 5 Now that we know something about Neurons….. THE NERVOUS SYSTEM PERIPHERAL NERVOUS SYSTEM CENTRAL NERVOUS SYSTEM PNS CNS Somatic Autonomic Division Division Brain Spinal Cord Sympathetic Parasympathetic Division Division 6 2 Peripheral Nervous System (PNS) Peripheral Nervous System Somatic Autonomic Sympathetic Parasympathetic 7 PNS: Somatic NS Sensory IN to CNS Sense and Respond: Voluntary  Sensory neurons transmit info from eyes, ears and other senses to CNS  Motor neurons send info from brain and spinal cord (CNS) to muscles Motor OUT from C8S Sensory Neurons PNS: Somatic System  input from body to brain and spinal cord (CNS) Motor neurons  output from CNS to control muscles and glands Interneurons  sensory-motor relay within CNS  outnumber other neurons  Both voluntary AND reflex movements 9  spinal reflex arc 3 Peripheral Nervous System (PNS) Peripheral Nervous System Somatic Autonomic Sympathetic Parasympathetic 10 PNS: Autonomic NS Involuntary Sympathetic Parasympathetic Respiration, circulation and digestion  2 systems work together  maintain equilibrium Sympathetic  Arousal:  activates as a total unit Parasympathetic  Tranquil:  affects one or a few organs at a time  slows down system; inhibits THE NERVOUS SYSTEM PERIPHERAL NERVOUS SYSTEM CENTRAL NERVOUS SYSTEM PNS CNS Somatic Autonomic Spinal Cord Division Division Brain Sympathetic Parasympathetic Division Division 12 4 Central Nervous System (CNS) Brain Spinal Spinal Cord Cord  40-45cm  transmits info between brain and body  handles simple reflexes Brain  3lbs of protein, fat and fluid  2% of total body weight  consumes 20% of your oxygen at a resting state 13 CNS: Spinal Cord Spinal injuries  Sensory input can’t get in  Motor output can’t get out  different levels wired to different body parts  quadriplegic vs. paraplegic 14 Clicker Q 15 5 CNS: The BRAIN How can we study the brain’s structures and activities in order to determine brain-behaviour relationships? 16 Unlocking the Secrets of the Brain 1. Stimulation and Destruction techniques 2. Neuropsychological tests 3. Electrical recording 4. Brain imaging 17 Electrical Stimulation Unlocking the Dr. Wilder Penfield Brain’s Secrets  founded MNI  stimulated parts of cortex with mild electrical current  patients were awake & responses could be recorded  mapped multiple areas  motor & sensory areas  areas for smell, touch etc. Destruction  Animals: heat, surgery, chemicals  Humans: disease, stroke or abnormal tissue 18 removal 6 Neuropsychology: the study of the psychological effects of brain damage in human patients Deals with the neurological bases of our thoughts, feelings, and behaviours  Where are memories stored in the brain?  How do we experience joy, anger, or desire?  Are there parts of the brain that have specialized functions? 19 Neuropsychological Patients  Determine the performance deficits of patients who have lesions (brain damage) to a specific part of the brain Examples:  Phineas Gage  Broca’s aphasia?  D. F.  split brain patients 20 2. Neuropsychological Tests Measures of verbal &
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