stimulus elicited behaviour Flashcards
(16 cards)
What are the two basic ways motor behaviours are initiated
1) Internally (act of will) → internally initiated behaviour
(2) Sensory stimulation → stimulus-elicited behaviour
Is stimulus-elicited behaviour voluntary or involuntary?
Involuntary
Define stimulus-elicited behaviour.
Involuntary, immediate behaviour in response to a sensory stimulus.
What is an eliciting stimulus?
A stimulus that triggers a reflexive or automatic response.
Most common type of stimulus-elicited behaviour?
Reflexes
What defines a reflex?
Involuntary response to an eliciting (proximal) stimulus.
What nervous system mediates autonomic reflexes?
Autonomic Nervous System (ANS)
What does the ANS control?
Smooth muscles, cardiac muscle, glands
Proximal vs. distal stimulus?
Proximal = physical energy hitting receptors
Distal = perceived object/source
Does reflex behaviour require recognition of the distal stimulus?
No
Two roles of eliciting stimuli?
(1) Releasing: triggers stored response
(2) Driving: continuously drives response
Which mode depends on stimulus intensity?
Driving mode
Example of driving mode reflex?
Pupillary reflex (more light → greater constriction)
Characteristics of stimulus-driven reflex responses?
Duration, amplitude/vigour, variation with stimulus
When is releasing mode useful?
When response size should be independent of stimulus strength
Example of releasing mode reflex?
Orienting reflex (turning to locate stimulus source)