Sensation and Perception Olfactory and Gustatory and Somatosensory Systems

The outermost layer of the epidermis

Semi-permeable outer layer of the skin, part of cutis

Part of the cutis, where hair roots and sweat glands reside

Fatty or adipose tissue layer which holds large blood vessels and nerves. attached to muscle and bones with connective tissue

Skin part of the nervous system filled with mechanical receptors that respond to physical distortion and provide information about the environment

Information enters the dorsal roots, passes through the ganglion, into the spinal cord and to the thalamus and the parietal lobe. relays information about pain, temperature, itch, and crude touch

Relays information about light touch, vibration, and conscious information

Create impulses controlling movement

Map of sensory space in its location

Small nerve fibers are stimulated. the projection neurons are stimulated and the inhibitory interneurons are blocked

Large nerve fibers are activated. projection neurons are activated and the inhibitory interneurons are as well, blocking the projection neuron signals.

Creates the perception of pain when stimulated by potentially damaging stimuli.

Disorder which affects the development and survival of sensory neurons. results in inability to produce tears, poor growth, trouble swallowing, insensitivity to pain.

The phenomenon of pain perceived at a site adjacent to an injury, such as chest pain during a heart attack

Glands that secrete SEBUM or an oily waxy substance to lubricate mammal skin and hair