GENERAL SENSES EXPERIMENT Flashcards
Ability to localize stimuli to parts of the body
topognosis
both the fast adapting and slow adapting different classes can be subdivided on the basis other aspects of their ______, where _____ is defined as the region of skin from where stimuli can evoke a response
receptive field
topographic representation of the surface of the body and face on the postcentral gyrus (BA 3,1,2)
Sensory homonculus
minimum distance at which 2 points of touch can be perceived as separate
indication of tactile acuity
two-point discrimination`
central somatosensory pathways for discriminatory touch and proprioception
carries the sensory modalities of fine touch (tactile sensation), vibration, and proprioception
dorsal column medial lemniscus pathway
Law/Principle
It is proposed that gradations of stimulus strength are discriminated approximately in proportion to the the logarithm of stimulus strength
weber fechner principle
sense that let us perceive the position and movement of our body. these sensations arise from signals of sensory receptors in the muscle, skin, and joints
position sense
Neospinothalamic pathway
Sensory Fibers: _______
Type of sensation: ______
Transmission: _______
Type of Pain: ________
Paleospinothalamic
Sensory Fibers: _______
Type of sensation: ______
Transmission: _______
Type of Pain: ________
Neospinothalamic:
Alpha delta
Epicritic
Somatosensory cortex and insular cortex
Good
Paleospinothalamic
C
Protopathic
Intralaminar and Ventrolateral nuclei
Bad
___________ are sensory neurons that detect changes in temperature, they are specialized cells that are sensitive to changes in temperature and are found in the skin, organs, and other tissues of animals
thermoreceptors
in vibration sense it is felt most intensely at the ________
dorsum of the foot
ability to recognize objects such as 1 peso coins
stereognosis
law where no matter where a specific sensory pathway is stimulated along the course to the cortex, the sensation formed is referred to the location of receptors
law of projection
also known as law of specific nerve energies
sensation evoked by impulses generated in a receptor depends upon the specific part of the brain they ultimately activate
muller’s law
principle wherein specificity of nerve fibers for transmitting only one modality of sensation
idea is that the quality of a particular sensation results from the fact that it is conveyed to the CNS by a specific set of afferents that have a distinct set of targets in the nervous system
labeled line principle
law where the magnitude of sensation felt by a person is directly proportional to logarithm of stimulus intensity
weber fechner law
