What are the (4) types of Sensory Afferents?

GSA

GVA

SSA

SVA

What is a GSA?

 General Somatic Afferent

for somatosensation

associated with skin (contact with the skin), bone, and muscle

- pain, temperature

What is a GVA?

General  Visceral Afferent

associated with viceral sensory information

- primarily unconscious

What is a SSA?

Special Somatic Afferent

"Special Senses"

associated with vision, audition, and vestibular senses

What is a SVA?

Special Visceral Afferent

"Chemical Senses"

associated with olfaction, gustation, pH & gas concentration in blood (last 2 we don't have conscious access to)

define decussation

the act of a neuron crossing over midline - crossing from one side of the spinal cord/brainstem/brain to the other

what is the adequate stimulus?

the best stimulus to which the receptor will respond 

they type of stimulus to which a receptor is tuned to respond to, or especially sensitive to

What is meant by modality?

 modality is the conscious experience/awareness of a stimulus

doesn't matter how the the receptor is activated the modality will still be experienced 

what is the Labeled Line Code?

the idea that receptors are specifically coded or tuned to certain stimuli - their adequate stimuli - 

What is the population code?

an increase in intensity is proportional to the number of receptors that are activated

What is the frequency code?

an increase in intensity is proportional to the RATE of the action potential genearation