PSY290H1 Chapter Notes - Chapter 3: Apical Dendrite, Interthalamic Adhesion, Reticular Formation
Document Summary
3. 1 general layout of the nervous system. Vertebrate nervous system split into two parts: Central nervous system, cns skull and spine: two main divisions, the brain and spinal cord brain located in skull vs. spinal cord in spine. Afferent nerves carry sensory info from receptors (skin, skeletal muscle, etc. ) to the cns. Efferent nerves carry motor info from cns to skeletal muscles: autonomic nervous system regulates internal environment. Afferent nerves carry sensory signals from internal organs to cns. Efferent nerves carry motor signals from cns to internal organs. Afferent going toward cns, arriving vs. efferent going away from cns, exiting. Sympathetic neurons synapse with second-stage neurons very far from target organs. Parasympathetic neurons synapse with very short second-stage neurons very closely to target organs. Csf cushions the brain having it removed causes frequent headaches and stabbing pains. Csf produced by choroid plexuses: networks of capillaries protruding into ventricles from pia mater.
