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Lecture

Lecture 2b
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Department
Psychology
Course
PSYC 1200
Professor
Jason Leboe- Mcgowan
Semester
Fall

Description
Lecture 2b Assumptions of Scientific Community 1. Process of evolution is responsible for physical traits found in members of a species(including humans) 2. The nervous system (mostly brain) is the origin of all thought and behavior Neuropsychology - Attempt to understand how processes in brain + nervous system cause aspects of thought and behavior Central Nervous System - Brain and Spinal Cord 1. Receives and processes info from the world through the senses and internal organs 2. Initiates responses through muscles and guides activities of glands and internal organs Spinal Cord  Relays info between brain and rest of body  Responsible for spinal reflexes (ex. Putting hand on hot item) Peripheral Nervous System - somatic and autonomic 1. Allows transfer of info from CNS to other body destinations via motor nerves to control muscles and glands 2. Allows transfer of info from body to CNS with sensory receptors via sensory nerves Somatic Nervous System  Sends info provided by sensory receptors to the brain  Voluntary actions Autonomic Nervous System:  Involuntary bodily functions  Heart rate, body temperature, digestion  Sympathetic Nervous System  Mobilizes resources  Alters metabolism of body in response to threat  Increases heart rate, breathing, blood pressure  Pupils dilate  Parasympathetic Nervous System  Conserves resources  Alters metabolism to conserve energy  Slows heart rate, lowers body temp Afferent Nerves - incoming Efferent Nerves - outgoing Nervous System Neurons  Responsible for info transfer  Many neurons bunched together form nerves Lecture 2b Dendrites  Treelike branches coming from cell body  Receives messages from other neurons or sensory receptors Cell Body  Maintains life of neuron Axon  Form branches/axon terminals that send messages at synapses with other neurons or muscle/gland cells Myelin Sheath  Produced by oligodendorocytes (glial cell)  Insulates neurons  White  Prevents interference from adjacent neural signals  Speeds up message transmission  Allows more neurons to be packed in small area  Loss of myelin causes MS Glia  Provide structural support and protection, waste removal, and nutrients for neurons Hindbrain  Reticular formation  Cerebellum  Pons  Medulla Midbrain  Reticular formation Forebrain  Thalamus  Hypothalamus  Limbic system  Cerebrum Stem Cells  New formed neurons that can multiply (neurogenesis)  Could cure Alzheimer/Parkinson's  Embryonic stem cells from aborted babies because they can form any type of cell Learning and Synapses  Number of synapses increases in infancy because of learning  Unused synapses are eliminated Synapse - point of transfer from axon of 1 neuron to dendrite of another Plasticity - Changes in con
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