Special Senses Lab

V1 Dermatome

Opthamalic division of trigemminal nerve (upper face)

V2 Dermatome

Maxillary division of trigemininal nerve (mid face)

V3 Dermatome

Mandibular division of trigemminal (lower face)

C2 Dermatome

Occipital Protuberance

C3 Dermatome

Supraclavicular fossa

Dermatome

Area of skin supplied with sensory information from a single spinal nerve

Dendritic endings

Pain and temperature receptors in the skin

Meissner’s Corpuscles

Respond to light touch

Pacinian corpuscles

Respond to strong pressure

Proprioceptors

Include muscle spindles and golgi tendon organs

Punctate distribution

The uneven clustering of cutaneous receptors which provide sensativity to body areas

Adaptation

Becoming unaware of a stimulus after prolonged exposure (not including pain or proprioceptors)

Referred Pain

Percieved in one part of the body, when another area is actually being stimulated

Taste buds

chemoreceptors

Circumvallate papillae

Large, circular bumps found on the back of the tounge (inverted V shape) - 50% of all taste buds

Foliate Papillae

Short Vertical folds on the side of the toungue or near the back

Fungiform papillae

Mushroom shaped, redish structures on front of tongue. Complex sensory organs for touch, taste, and temperature.

Phenylthiocarbamide

70% of people recognize the very bitter taste (depends on genetics)