Structural Classification of the Nervous System
Central Nervous System (CNS)
Organs Brain Spinal Cord Function Integration; command center Interpret incoming sensory information Issues outgoing instructions Peripheral Nervous System (PNS) Nerves Spinal Nerves - carry impulses to and from the spinal cord Cranial Nerves - carry impulses to and from the brain Function Serve as communication lines among sensory organs, the brain and spinal cord, and glands or muscles |
Functional Classification of the Peripheral Nervous System
Sensory (afferent) Division
Nerve fibers that carry information to the central nervous system
-somatic sensory firers carry information from the skin, skeletal muscles & joints
-visceral sensory fibers carry information from visceral organs
Motor (efferent) Division
Nerve fibers that carry impulses away from the central nervous system organs
-somatic nervous system is voluntary
-autonomic nervous system is involuntary (further subdivided)
-sympathetic nervous system
-parasympathetic nervous system
Nerve fibers that carry information to the central nervous system
-somatic sensory firers carry information from the skin, skeletal muscles & joints
-visceral sensory fibers carry information from visceral organs
Motor (efferent) Division
Nerve fibers that carry impulses away from the central nervous system organs
-somatic nervous system is voluntary
-autonomic nervous system is involuntary (further subdivided)
-sympathetic nervous system
-parasympathetic nervous system