PS101 Chapter Notes - Chapter 4: Parasympathetic Nervous System, Autonomic Nervous System, Peripheral Nervous System
Document Summary
Defn: the portion of the nervous system consisting of the brain and spinal cord. Receives, processes, interprets, and stores incoming sensory information (taste, sounds, etc. ) Sends out messages for muscles, glands, and organs. Made up of two components: the brain, the spinal cord. Defn: a collection of neurons and supporting tissue running from the base of the brain down the centre of the back, protected by a column of bones. Acts as a bridge between the brain and the parts of the body below the neck. Produces spinal reflexes (touching a hot iron and quickly removing hand) Nerve impulses bring a message to the spinal cord, which then sends out a command for your muscles to retract your hand away from it. Reflexes above the neck involve the lower part of the brain. Can be influenced by thoughts and emotions (ex. Erection, controlling ejaculation, not moving your leg when it"s tapped)
