PSY290H1 Chapter Notes - Chapter 3: Pyramidal Cell, Interthalamic Adhesion, Red Nucleus
Document Summary
Cns: is the division of the nervous sytem that is located within the skull and spine. Pns: is the divison that is located outside the skull and spine. Under pns:1) somatic nervous system: interacts with the external environment. it is composed of affferent nerves that carry sensory signals from the skin, skeletal muscles, joints, eyes, ears, and so on to the central nervous syste. Efferent nerves that carry motor signals from the cns to the skeletal muscles. Also protecting the cns is the cerebrospinal fluid (csf), which fills the subarachnoid space, the central canal of the spinal cord, and the cerebral ventricles of the brain. The subarachnoid space, central canal, and cerebral ventricles are interconnected by a series of openings and thus form a single reservoir. The cerebrospinal fluid supports and cushions the brain. : problem with csf, they experience stabbing pain each time they jerk their head.
