PSY 3061 Chapter Notes - Chapter 3: Choroid Plexus, Hydrocephalus, Central Canal
Document Summary
Vertebrate nervous system: central nervous system (cns): within the skull and the spine. The spinal cord: located in the spine: peripheral nervous system (pns): outside the skull and spine. Somatic nervous system (sns): interacts with the external environment. Afferent nerves: carries sensory signals from the eyes, ears, skin, etc. to the cns. Efferent nerves: carries motor signals to the skeletal muscles from the cns. Autonomic nervous system (ans): regulates the internal environment of the brain. Afferent nerves: carries sensory signals from the internal organs to the cns. Efferent nerves: carries motor signals to internal organs from the cns. Sympathetic nerves: project from the cns in the lumbar (small of the back) and thoracic (chest) regions of the spinal cord. Used in threatening situations to stabilize body and energy resources; psychological arousal; fight. Cns in the brain and sacral (lower back) region of the spinal cord.
