Physiology Chapter 6 BIOL 2305-017 (23314)
Terms in this set (40)
Incoming information about the viscera.
The pathway that brings in afferent information.
Sensation that arises from the body's surface, muscle, inner ear, skin, and joints.
These include vision, hearing, taste, and smell.
Our conscious interpretation of the external world as created by the brain from a pattern of nerve impulses delivered to it from sensory receptors.
Energy forms in which stimuli take form.
These are found on the peripheral endings of afferent neurons.
The process of changing a stimuli into an electrical signal.
The stimulus that a receptor is specialized to respond to.
Responsive to light.
Responsive to mechanical energy.
Sensitive to thermal energy.
Sensitive to changes in solute concentrations and the resultant change in osmosis.
Responsive to certain chemicals.
"Pain Receptors" Sensitive to damage. Three types mechanical, thermal, and polymodal.
A local depolarizing change in potential in a separate receptor.
A local depolarizing change in potential in a afferent neuron.
This occurs when neurons diminish their signal strength despite the sustained signal strength.
These receptors do not adapt at all or adapt slowly.
These receptors adapt quickly.
A slight depolarization that occurs when a stimulus is removed from a phasic receptor.
A phasic receptor in the skin that detects pressure and vibration.
Paths that convey convey conscious somatic sensation. These consist of discrete chains of neurons synaptically interconnected in a particular sequence to accomplish progressively more sophisticated processing of the sensory information.
Detects stimulus and synapses with second-order neurons in the spinal cord or the medulla, depending on the path taken.
Synapses in the medulla or the spinal cord, depending on the path taken. Synapses with the third-order neuron in the thalamus.
Synapses in the thalamus.
Different types of incoming information separated inside of these.
The sensation of feeling pain in an area of the body that is no longer there (e.g. Feeling pain in a foot that has been lost). The body receives information that is interpreted to be from that part of the body.
A region of skin surface that corresponds to a certain somatosensory neuron.
"Discriminative ability" The sensitivity of a receptive field to different numbers of simultaneous stimuli.
The somatosensory neuron of one receptive field inhibits the stimuli of neighboring receptive fields. This is done to give a more accurate reading to the brain.
The sensation of damaged tissue. Can be influenced by emotions.
This nociceptor is sensitive to temperature.
This nociceptor is sensitive to mechanical forces.
This nociceptor is sensitive to all kinds of damaging stimuli.
"Fast pain pathway" Pain signals are sent up to 30 m/s through these routes.
"Slow pain pathway" Pain signals are sent at a rate of 12 m/s through these routes.
A normally inactive substance that is activated by enzymes released into the ECF from damaged tissue.
This stimulates afferent C fibers gives a burning sensation.
Activates ascending pathways that transmit nociceptive signals to higher levels for further processing.