Human Anatomy: The Nervous System (I)

Front 1

Functions of the nervous system

Back 1

1. sensory input
2. Integration (information processing)
3. Motor output (involuntary or voluntary)

Front 2

Structural Classification of the Nervous System

Back 2

1. Central Nervous System (CNS): Brain and Spinal Cord
2. Peripheral Nervous System (PNS): Peripheral nerves, Ganglia, Sensory receptors

Front 3

Sensory division or Afferent Division

Back 3

Sensory neurons carry information to the CNS from:
1. Special Sensory Receptors (in sensory organs like the photoreceptor in the eye)
2. Somatic Sensory receptors:
a. exteroceptors(in the skin: Thermoreceptors for temperature, nociceptors for pain, and pacinian corpuscles for pressure.
b. Proprioceptors( in muscles, joints and tendons for position and movement)
3.Visceral sensory receptors: Interoceptors in organs such as heart or on smooth muscle of organs like the lungs or intestines.

Front 4

Motor Division or Efferent Division

Back 4

Motor (efferent) neurons carry commands from the CNS to:
A: Somatic motor effectors: Skeletal muscles (commands are voluntary)
B: Visceral motor effectors (smooth muscle, cardiac muscle and glands). Commands are involuntary or autonomic (sympathetic or parasympathetic