The Sense Of Touch Flashcards
what do cutaneous receptors in the skin detect?
touch, temperature and pain
What does the receptive field of a neuron do?
a region of space on receptor surface, which if stimulated, alters the activity of the neuron
what is proprioception?
perception of the position of limbs in space
what is kinesthesis?
perception of body movements
what is haptic perception?
a combination of touch perception of petterns on the skin surface and proprioception
what is a spinothalamic pathway?
carries info about skin temperature and pain
what is the dorsal-medial lemniscal pathway?
carries signals from the skin, muscles and joints
what is the homunculus?
the point for point correspondence of an area on the body surface to a specific point on the CNS
what are three cutaneous receptors
touch temperature and pain
how do cutaneous receptors work
receptor membrane contain ion channels sensitive to mechanical forces
what happens when touched at one point
large receptive field
what happens when touched at touch points
small receptive field
