Sensation and Perception Final Flashcards
Which functionality would be most affected if you lost your SA I (Merkel) touch receptors?
Texture perception and pattern/form perception, like for reading Braille
Mechanoreceptors that have a fast adaptation rate and small receptive field size are called
Meissner corpuscles.
When you stub your toe, you first feel a quick, sharp pain transmitted by _______, and then a moment later, a dull, throbbing pain transmitted by _______.
A-delta fibers; C fibers
If you stick your hand in a bucket of ice water for a few moments you will most likely feel both cold and pain sensations. Which pathway, from the spinal cord to the brain, carries this information?
Spinothalamic
The spinothalamic pathway decussates at the , while the dorsal column-medial lemniscal pathway decussates at the .
level of entry into the spinal cord; medulla
Suppose you are a patient in one of Penfield’s famous experiments involving stimulation of the somatosensory cortex. During the procedure, the brain stimulation causes you to feel a tingling in your right arm. If Penfield moves the probe a centimeter along the cortex and stimulates the brain there, which part of your body will most likely feel a tingle?
Right elbow
Suppose you hit your shin on a piece of furniture and it starts to hurt. Which theory explains why rubbing your shin might make it hurt less?
Gate control theory
Which concept explains why a cut on your finger is more sensitive to pain until it heals?
Hyperalgesia
Suppose you reach into the depths of your backpack without looking and find a pencil using your sense of touch alone. You have just engaged in _______ perception.
haptic
Suppose a rat pup is born to a mother who does not lick and groom her offspring but is raised by a foster mother who does lick and groom the rat pup. What can we expect of the rat pup’s behavior as they mature?
The rat pup will be less timid and more likely to groom its own offspring.
_______ olfaction refers to sniffing in and perceiving odors through the nostrils, while _______ olfaction refers to perceiving odors through the mouth while chewing.
Orthonasal; retronasal
Meet John. All food tastes pretty bland to him—he can only sense the sweetness, saltiness, bitterness, or sourness of food, but none of the other complexities. What is the best diagnosis for John?
Anosmia
_______ are the second layer of cells surrounding the glomeruli. They respond to fewer odorants than the first layer, but to more than the neurons at the deepest layer of cells.
Tufted cells
_______ form part of the deepest layer of cells in the olfactory bulb. They comprise an extensive network of inhibitory neurons, integrate input from all the earlier projections, and are thought to be the basis of specific odorant identification.
Granule cells
Sometimes odorants can stimulate the somatosensory system through polymodal nociceptors. These sensations are mediated by the _______, which transmits information about the “feel” of an odorant.
trigeminal nerve
This odor is created when at least 30 odorants of equal intensity that span olfactory physiochemical and psychological (perceptual) space are mixed. The resultant odor percept is the same as every other mixture of 30 odorants meeting the span and equivalent intensity criteria, even though the various mixtures do not share any common odorants.
Olfactory white
