Sensation: Somesthetic Senses - Skin & Vestibular Flashcards
the body senses consisting of the skin senses, the kinesthetic and proprioceptive senses, and the vestibular sense
Somesthetic Senses
organ of the body is about 20 square feet in size
skin
just beneath the skin and respond to changes in pressure
Pacinian corpuscles
just beneath the uppermost layer of the skin that respond to changes in temperature and to pressure—and to pain
free nerve endings
pain (and pressure) in the organs
Visceral Pain
pain sensations in the skin, muscles, tendons, and joints are carried on large nerve fibers
Somatic Pain
in this theory, the pain signals must pass through a “gate” located in the spinal cord
Gate-Control Theory
conditions of the people who are born without the ability to feel pain
Congenital Analgesia and Congenital Insensitivity to Pain with Anhidrosis (CIPA)
occurs when a person who has had an arm or leg removed sometimes “feels” pain in the missing limb
Phantom Limb Pain
the awareness of body movement
Kinesthesia
awareness of where the body and body parts are located in relation to each other in space, and to the ground
Proprioception
the awareness of the balance, position, and movement of the head and body through space in relation to gravity’s pull
Vestibular Sense
Kind of Vestibular Organ:
tiny sacs found just above the cochlea
Otolith organs
Kind of Vestibular Organ:
three somewhat circular tubes that are also filled with fluid that will stimulate hairlike receptors when rotated
Semicircular Canals
disagreement between what the eyes say and what the body says is pretty much what causes
Motion Sickness
an explanation of motion sickness in which the information from the eyes conflicts with the information from the vestibular senses, resulting in dizziness, nausea, and other physical discomfort
Sensory Conflict Theory
