PSYO 1011 Lecture Notes - Lecture 5: Central Nervous System, Peripheral Nervous System, Autonomic Nervous System

• School: Dalhousie University
• Department: Psychology
• Course: PSYO 1011
• Professor: n/a

Document Summary

Sensory neurons: carry information from sensory organs to spinal cord/brain, quite different structurally from other neurons. Interneurons: exist within spinal cord/brain, carry messages from neuron to neuron, most numerous, motor neurons. The nervous system: carry information from spinal cord/brain muscles/glands. 2 major divisions: central nervous system (cns) Integrates & coordinates information: peripheral nervous system (pns) Nerves to/from cns: all neurons that connect cns to muscles, glands & sensory receptors. The peripheral nervous system: cranial nerves, 12 pairs, protrude directly from brain. Spinal nerves: 31 pairs, protrude directly from spinal cord, bilateral, contain axons from sensory & motor neurons, note, collection of axons in pns = nerve, collection of axons in cns = tract. Somatic nervous system: allows you to sense/respond to your environment, sensory nerves from eyes, ears, etc, motor nerves to skeletal muscle, voluntary movements, autonomic nervous system. The nervous system: acts on visceral muscle & glands, involved in involuntary functions, 2 branches.