Pain

Question 1

Tonic receptors

Answer 1

Slowly adapting(want them to detect the painful stimulus more continuously because that stimulus could hurt you)

Question 2

Phasic receptors

Answer 2

Rapidly adapting (e.g. put on shirt)

Question 3

Key aspects - fast pain

Answer 3

Sharp
Mechanical or thermal stim.
Easily localised 
Occurs first 
A-delta fibres (sml/myelinated)

Question 4

Key aspects - slow pain

Answer 4

Dull/aching 
Mech, thermal or chemical stimulus 
Poorly localised 
Occurs second; persists 
C-fibres (sml/unmyelinated)

Question 5

Ascending pathway: Lateral discriminative pathway

Answer 5

Painful stimuli activate neurons that ultimately synapse at the somatosensory cortex. Considers the perception, localisation and intensity of pain through A-delta fibres

Question 6

Ascending pathway: Medial affective-motivational pathways

Answer 6

Pain to emotional centres of brain. Stimulates the hypothalamus (symp/behavioural resp), limbic syst. (emotional) & reticular formation (alert)
Pathway primarily C fibres

Question 7

3 causes of visceral pain

Answer 7

1) Ischemia (lactic acid & chemicals)
2) Muscle spasms: cramping
3) overdistension
(c-fibres dull ache, often refferred to body surface)