Nervous System Overview

Flowchart nodes

• Nervous System

• Central Nervous System (CNS) 

• Peripheral Nervous System (PNS) 

• Brain 

• Spinal Cord

• Sensory (afferent division) 

• Motor (efferent  division) 

• Somatic (voluntary) Nervous System

• Autonomic Nervous System

• Somatic sensory fibres

• Visceral sensory fibres

• Conveys sensory impulses from skin, skeletal muscles, joints, cornea and conjunctiva 

• Conveys sensory impulses from visceral organs (e.g. digestive tract) 

• Conscious control of skeletal muscles. 

• The ANS function: Visceral motor nerve fibres. Involuntary system. Regulates smooth muscle (e.g. iris, CB), cardiac muscle and glands (e.g. lacrimal) 

• Parasympathetic Nervous System"rest and digest"

• Sympathetic Nervous System"fight or flight"