PSYC 271 Chapter Notes - Chapter 3: Dura Mater, Dural Venous Sinuses, Pia Mater

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The longest are the vagus nerves (x) that have fibres to and from the gut. o. * afferent: sensory signals from skin, muscles, eyes, ears about environment and your position in it. Smooth muscle (gut, blood vessels), cardiac muscle, glands. Two neurons to get to target (preganglionic and postganglionic neurons) The autonomic nervous system (ans) can be further subdivided: Brain and sacral spinal cord (at base, near vestigial tail) Thoracic and lumbar spinal cord (back and lower back) A target organ can receive opposing sympathetic and parasympathetic input, and is thus controlled by the relative levels. Ganglia are far from target organs, lying close to spinal cord. Stimulate, organize, mobilize energy in threatening situations; arousal: fight or flight. Page 3 of 7: meninges: 3 protective membranes for the brain and spinal cord: from outside in: Arachnoid mater ( spider-like mother ): attached to o membrane layers anchored to skull.

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