Sensory 2: Sensory Code

Question 1

Define sensory Code

Answer 1

The ability of the CNS to recognise Modality, Locality, Intensity of sensation

Question 2

Laws of Modality of Sensory code

Answer 2

Adequate stimulus:
Each receptor is highly sensitive to 1 type of stimulus

Muller’s Law:
each stimulus gives to 1 type of receptors

Labeled line principle:
Each sensation reaches CNS through a specific pathway

Question 3

Laws of Locality of Sensory Code

Answer 3

Law of projection:
seperate reperesntation area in cerebral cortex for each body part (point to point representation)

Phantom limb phenomenon:
pressure in stump of amputated limb causes the patient to feel pain in the place of the absent limb

Question 4

Laws of Intensity of Sensory Code

Answer 4

Number of Receptors Activated by Stimulus:
Higher stimulus Intensity recruits more Receptors at receptive field

Frequency of Impulses:
Frequency of Action potentials Generated Directly proportional with Intensity of Stimulus