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NS exam > Somatovisceral sensitivity I > Flashcards

Somatovisceral sensitivity I Flashcards

1
Q

Common features of somatovisceral sensitivity

A

receptors all over and inside the body
afferent fibres are distributed among many peripheral nerves and tracts and thus, do not form special nerve such as the optic nerve

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2
Q

tactile sense

A

detection and cn processing of non-harmful mechanical stimuli of the skin

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3
Q

4 sensations of the tactile sense

A

touch
pressure
vibration
tickle

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4
Q

tacticle sense receptors are physiologically classified?

A

slowly adapting mechanoreceptors
rapidly adapting mechanoreceptors
type c mechanoreceptors

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5
Q

tactile and thermoreception is found from

A

skin and mucous membranes

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6
Q

proprioception is found from

A

muscles, tendons, joints, and bones

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7
Q

visceral sensitivity is found from

A

thoracoabdominal viscera

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8
Q

nociception is found from

A

almost all organs

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9
Q

slowly adapting tactile sense receptors

A

merkel’s discs

ruffini’s endings

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10
Q

rapidly adapting tactile sense receptors

A

meissner’s corpuscles
krause’s corpuscles
tactile hair
free nerve endings (type c)

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11
Q

very rapidly adapting tactile sense receptors

A

pacinians corpuscles

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12
Q

meissner’s corpuscle modality

A

stroking, fluttering (gentle)

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13
Q

merkel’s disc modality

A

pressure, texture

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14
Q

pacinian corpuscle modality

A

vibration

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15
Q

ruffini ending modality

A

skin stretching

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16
Q

thermal receptors

A

cool and warm receptors, heat and cold nociceptors

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17
Q

cool receptor modality

A

skin cooling 25C

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18
Q

warm receptor modality

A

skin warming 41C

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19
Q

heat nociceptor modality

A

hot temp >45C

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20
Q

cold nociceptor modality

A

cold temp <5C

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21
Q

nociceptors

A

mechanical, thermal-mechanical (two types), polymodal

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22
Q

mechanical nociceptor modality

A

sharp, pricking pain

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23
Q

thermal-mechanical nociceptor modality

A

1st: burning pain
2nd: freezing pain

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24
Q

polymodal nociceptor modality

A

slow, burning pain

25
Q

muscle and skeletal mechanoreceptors

A

muscle spindle primary and secondary
golgi tendon organ
joint capsule mechanoreceptor
stretch-sensitive free endings

26
Q

muscle spindle primary - modality

A

muscle length and speed

27
Q

muscle spindle secondary - modality

A

muscle stretch

28
Q

golgi tendon organ modality

A

muscle contraction

29
Q

joint capsule mechanoreceptor modality

A

joint angle

30
Q

stretch-sensitive free endings modality

A

excess stretch or force

31
Q

pacinian corpuscle location

A

mesentry
between layers of muscles
on intraosseous membranes

32
Q

proprioception

A

sensorial information about position and movement sequences

33
Q

muscle spindle

A

proprioceptive spindle

34
Q

muscle spindle is formed of

A

group of fusiform bundles (spindle) of encapsulated and specialised muscle fibers with independent sensory and motor innervation

35
Q

intrafusal muscle fibres

A

encapsulated and specialised muscle fibers that occur in spindle-like (fusiform) bundles

36
Q

muscle spindles are sensitive to

A

muscle stretching = changes in muscle lenght

37
Q

types of intrafusal muscle fibres

A

nuclear bag fibres

nuclear chain fibres

38
Q

What structures surround intrafusal muscle fibres?

A

Extrafusal muscle fibers

39
Q

extrafusal muscle fibers

A

skeletal muscle fibers that surround intrafusal muscle fibres

40
Q

nuclear bag fibres

A

intrafusal muscle fibres which have dilated central portion with multiple nuclei inside

41
Q

nuclear chain fibres

A

intrafusal muscle fibres with nuclei arranged in a row

42
Q

what types of nerve components do the muscle spindles have?

A

sensory and motor

43
Q

what types of sensory nerve components do the muscle spindles have?

A

primary and secondary sensory nerve fibres

44
Q

what types of motor nerve components do the muscle spindles have?

A

gamma motorneurons

45
Q

primary and secondary sensory nerve fibre location

A

they spiral around the central portions of intrafusal muscle fibres

46
Q

what do the primary and secondary sensory nerve fibres do

A

inform about muscle stretch=lenght

47
Q

gamma motorneurons

A

lower motor neurons
role in keeping the muscle tense
also adjust the sensitivity of muscle spindles

48
Q

primary sensory fibres of muscle spindle synonym

A

type Ia sensory fibers

49
Q

what do type 1a sensory fibres do

A

they monitor how fast muscle stretch changes = velocity of the stretch

50
Q

type Ia sensory fibers are

A

fast axons

51
Q

What charactires type I a sensory fibres?

A 
rapid adaptation
(as soon as muscle stops changing lenght they stop firing and adapt to the new leght.
52
Q

where are type 1a sensory fibres?

A

they wrap the central part of nuclear bag and nuclear chain fibers with annulospiral nerve endings.

53
Q

secondary sensory fibres of muscle spindle synonym

A

type II sensory fibres or typeAbeeta

54
Q

what do type II sensory fiber do?

A

they inform about the position of muscle

55
Q

whew are type II sensory fibres

A

innervating the ends of nuclear bag and nuclear chain fibres

56
Q

what charactireses type II sensory fibres

A

they are non adapting fiberes
(even when there is no change in muscle lenght they keep respoding to stimuli and informing about thestill muscles position)

57
Q

muscle spindles are placed in

A

parallel with the extrafusal fibres

58
Q

golgi tendon organs are placed in

A

in serial connection with the extrafusial fibres

NS exam (5 decks)

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