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TSM > 1.5 Sensory Receptors > Flashcards

1.5 Sensory Receptors Flashcards

1
Q

Which types of neurones are unipolar or multipolar?

A

Unipolar - sensory

Multipolar - motor

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2
Q

Where are cell bodies of motor neurons and sensory neurons situated?

A

Sensory cell bodies - DRG

Motor cell bodies - spinal cord

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3
Q

Are the sensory neuron cell bodies found in the CNS?

A

somatic sensory afferent fibre cell bodies lie in the cns - spine

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4
Q

Are motor and sensory neurons myelinated?

A

Motor - myelinated

sensory - both myelinated and unmyelinated

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5
Q

What are the two classifications of peripheral nerves and for which nerves are they for?

A

Roman - only sensory

Letter - both motor and sensory

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6
Q

What happens to the diameter and speed of conduction when you go down both of the classifications?

A

Diameter decreases and velocity decreases

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7
Q

Name the classifications of nerves linked to; muscle spindle, golgi tendon organ, touch & pressure, pain & cold receptors, pain & temp.

A 
Muscle spindle - Ia & Aalpha 
Golgi tendon - Ib & Aalpha
Muscle spindle, touch and pressure - II & Abeta 
Pain and Cold - III & Adelta 
Pain & Temp - IV & C
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8
Q

Explain sensation and perception

A

Sensation - conscious or subconscious awareness of the environment
Perception - interpretation of the sensation

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9
Q

Name the 2 types of modalities

A

General and Special

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10
Q

What are the 2 types of general senses?

A

Visceral and Somatic

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11
Q

Name the three types of sensory receptors and explain them

A

Microscopic - free nerve endings etc.
Stimulus - mechano, chemo etc
Location - intero, extero & proprio

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12
Q

Hair follicle…

A

Unencapsulated, A beta/II, myelinated

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13
Q

meissner corpuscle…

A

Encapsulated, A beta/II, myelinated, tap flutter, 5 - 40 Hz

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14
Q

ruffini corpuscle …

A

Unencapsultaed, A beta/II, myelinated, skin stretch and slippage

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15
Q

merkel cells…

A

Unencapsulated, A beta/II, myelinated, touch & pressure

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16
Q

Pacinian cells…

A

Encapsulated, myelinated, A beta/II, vibration, 60 - 300 Hx

17
Q

Free nerve endings…

A

Nocireceptors,
A delta - myelinated, sharp pain, III
C fibre - unmyelinated, dull pain, IV

18
Q

Why does coding of sensory information occur?

A

When the tonic firing changes - change of frequency/rate, duration of APs, or activation of another sensory receptor

19
Q

Name the receptors which are Rapid acting and Slow acting

A

Rapid acting - large frequencies, transient, phasic or vibratory - messier and pacinian
Slow acting - change of intensity or duration - ruffini & merkel

TSM (67 decks)

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