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Neurology > Sensory Receptors (Quiz 3) > Flashcards

Sensory Receptors (Quiz 3) Flashcards

1
Q

An area (“cut” or “slice”) of the skin that is a combination of the receptive field of the sensory axons originating from a single spinal nerve

A

Dermatome

*Named according to the spinal nerve that supplies them

**Form into bands around the trunk but their limb organization is more complex, as a result of embryological development

***With loss of function of a single spinal nerve, sensation from the dermatome it supplies is not completely lost, due to overlap. There is, however, reduced sensitivity

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2
Q

Upper Limb Dermatomes

A
  • C5
  • C6
  • C7
  • C8
  • T1
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3
Q

Dermatome of the Lateral Shoulder and Arm

A

C5

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4
Q

Dermatome of the Thumb and Index Finger

(Radial Border of the Hand)

A

C6

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5
Q

Dermatome of the Middle Finger

A

C7

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6
Q

Dermatome of the Digiti Minimi

(Ulnar Border of the Hand)

A

C8

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7
Q

Dermatome of the Medial Elbow

A

T1

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8
Q

Thoracic Dermatomes

A

T2-T12

*Intercostal nerves form segmental strips on the thorax

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9
Q

Dermatome band that goes across the Umbilicis

A

T10

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10
Q

Subcostal nerve that supplies the Dermatome that goes across the upper edge of the pubic bone

A

T12

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11
Q

Group of sensory receptors found in the dermis or epidermis

A

Cutaneous Receptors

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12
Q

Superficial layers of hairless skin

A

Glabrous Skin

*found in area such as fingertips and lips

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13
Q

Two Cutaneous Receptors found in the upper most part of the Dermis (especially in glabrous skin)

Sense fine (discriminative) touch

A
  • Merkel Cells
  • Meissner Corpuscles
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14
Q

Cutaneous Receptors found in glabrous skin

Sensitive to skin stretch

Monitor slippage of objects along the surface of the skin, allowing for modulation of grip on an object

A

Ruffini Corpuscles

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15
Q

Receptors found deeper in the skin and subcutaneous tissue

Detect “deep touch” (pressure)

A

Pacinian Corpuscles

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16
Q

Unmyelinated terminal branches of a neuron

No connective tissue capsule

A

Naked (free) Nerve Endings

Ex. Nociceptors

17
Q

Neurons that have a connective tissue capsule surrounding accessory structures

Are often refered to as sense organs

A

Encapsulated Sensory Receptors

Ex. Pacinian Corpuscles

18
Q

Sensory Receptors the respond to Light

A

Photoreceptors

19
Q

Sensory receptors that respond to Chemical Stimulus

A

Chemoreceptors

Ex. Smell, Taste

20
Q

Sensory receptors that respond to Tempurature

A

Thermoreceptors

21
Q

Receptors that respond to mechanical stress

Depolarize when their membranes are physically stretched

A

Mechanoreceptors

22
Q

Damage to the Nervous System, due to disease or trauma, may cause

A

Neuropathic Pain

Aka Neurogenic Pain

23
Q

Stimulation of a nociceptor may cause

A

Nociceptive Pain

24
Q

The Two Major types of Nociceptors

A
  • A-Delta
  • C. AKA C-PMN (Polymodal)
25
Q

The ability to know where your body is in space, without the use of vision

A

Proprioception

26
Q

2 Examples of Proprioception

A
  • Muscles Spindles
  • Golgi Tendon Organs
27
Q

Muscle spindles detect

A
  • Rate of change in muscle length (stretch)
  • Static length of a muscle (tone)
28
Q

Distributed throughout the fleshy part of skeletal muscle

Found in greatest abundance in muscle capable of delicate, fine, contractile ability

A

Muscle Spindles

29
Q

Muscle spindles are especially abundant in the small muscles of the? (2)

A
  • Hand
  • Foot

* Muscle spindles are scarce in the tongue and ocular muscles

30
Q

The unipolar neuron coming from a muscle spindle is refered to as a

A

1a fibre

31
Q

Sensory receptors located within a muscle are called?

A

Muscle Spindles

32
Q

Muscle Spindles consist of the peripheral axons of 1a sensory neurons (unipolar) and what kind of muscle fibres?

A

Intrafusal muscle fibres

33
Q

Muscle Spindles are what kind of receptors?

A

Mechanoreceptors

*respond to stretch and signal changes in muscle length

34
Q

Muscle Spindles communicate information of where the body is in space (proprioception) and how fast body limbs are moving in space (velocity) to what?

A

CNS

35
Q

Sensitivity of detecting changes in muscle length is adjusted by

A

Gamma Motor Neurons

Neurology (4 decks)

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