 | Term | Definition |
| |
Babinski Reflexes |
Adults- plantar reflex. Infants: Toes wiggling |
| |
Flexion Reflexes |
Withdrawl Reflex, Crossed Extensor reflex |
| |
Superficial Reflexes |
Corneal Reflex, Gag Reflex |
| |
Visceral Reflexes |
Ciliospinal Reflex, Light Reflex, Consensual Light Reflex |
| |
ciliospinal reflex action |
pupillary dilation |
| |
light reflex action |
pupillary constriction |
| |
consensual light relfex action |
bilateral reflex |
| |
threshold stimulus |
A stimulus that effects a response in the sensory neuron. |
| |
ADAPTATION |
Reduction in the frequency of action potentials fired by sensory neuron due to a constant stimulus. |
| |
phasic sensory modalities |
Rapid adaptation (skin receptor) |
| |
tonic sensory modalities |
Slow adaptation (pain receptor) |
| |
ACCOMMODATION |
happens with sensory neurons. raising of the threshold necessary to fire action potentials |
| |
Law of Specific Nerve Energies |
Sensory receptors are most receptive to a single stimulus, but can respond to more than one type of physical stimulus |
| |
LARGE sensory field |
Fewer cells in somatosensory cortex (back of neck, thigh) |
| |
SMALL sensory field |
More cells in somatosensory cortex (finger, lips) |
| |
phantom limb pain |
Inappropriate stimulation of sensory neuron between terminal and spinal cord |
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referred pain |
nappropriate stimulation of the secondary sensory neuron in the spinal column. |
| |
sensory receptors function |
generate receptor potentials through signal transduction mechanisms. |
| |
postcentral gyrus |
Primary Sensory Cortx |
| |
precentral gyrus |
Primary Motor Cortex |
