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Control Term Two > Somatosensory One > Flashcards

Somatosensory One Flashcards

1
Q

Tactile (innocuous) sensations

A

Low threshold mechanoreceptors

Merkel, Ruffini, Meissner & Pacinian types

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2
Q

Proprioception

A

Spindle and golgi tendon receptors

Some inputs from cutaneous mechanoreceptors

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3
Q

Thermal sensations

A

Thermoreceptors localised in discrete zones that exhibit hot and cold sensitivity

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4
Q

Nociceptive (painful) receptors

A

Mechanical, thermal and polymodal nociceptors

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5
Q

Meissners corpuscles

A

Looping axonal terminals that intertwine supporting cells

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6
Q

Merkel’s

A

Dome structure atop axon terminals

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7
Q

Pacinian corpuscules

A

Sensory axon surrounded by fluid filled capsule, onion-shaped appearance

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8
Q

Ruffini endings

A

Nerve terminals intertwined with collagen fibrils

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9
Q

Nociceptors

A

Free nerve endings that penetrate epithelial cells, no morphological specialisation

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10
Q

Meissner corpuscles and Merkel receptor field

A

Merkel are the smallest.

Small receptor field

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11
Q

Ruffini corpuscles area on hand

A

Large

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12
Q

Pacinian corpuscles area on hand

A

The largest

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13
Q

Slow adapting cells

A

Merkel’s disk

Ruffini’s ending

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14
Q

Fast adapting cells

A

Meissner’s corpuscle

Pacinian corpuscle

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15
Q

Extract of chilli peppers

A

Capsaicin

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16
Q

Capsaicin belongs to what group of chemicals

A

Vanilloids

17
Q

Large diameter sensory afferents

A

Large diameter
Rapidly conducting afferents (I/II)
Associated with low threshold mechanoreceptors

18
Q

Small diameter sensory afferents

A 
Slow conducting (III/IV)
Associated with nociceptors and thermoreceptors
19
Q

Primary somatosensory cortex (S1) areas

A

1, 2, 3a, 3b

20
Q

Secondary somatosensory cortex (S2) areas

A

5, 7

21
Q

Primary somatosensory cortex - features

A

Localised to post central gyrus and flanked by central and post central gyrus
Receives strong somatosensory inputs from thalamus
Each area is specialised

22
Q

Secondary somatosensory cortex - features

A

Lies adjacent to S1 along the lateral sulcus
Plays a key role in sensory and motor integration
Receives corpus callosum inputs to form joined up body image
Build info from multiple body areas, body image

23
Q

Association areas - features

A

Localised to posterior parietal cortex

Plays role in integration of multimodal senses

24
Q

Astereoagnosia

A

The inability to identify objects on basis of touch alone

25
Q

Neglect syndrome

A

Body part of visual field is disregarded

Control Term Two (25 decks)

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