Chapter 3: SENSORY PHYSIOLOGY

Question 1

IDENTIFY

Large and medium-sized myelinated fibers

Answer 1

Type A NERVE FIBERS

Question 2

IDENTIFY

Unmyelinated nerve fibers

Answer 2

Type C NERVE FIBERS

Question 3

What is the Alternative Classification

A-α

General Classification

Answer 3

Ia (Annulospiral endings)
Ib: Golgi Tendon Organs

Alternative Classification

Question 4

MWhat is the Motor Function?

A-α

General Classification

Answer 4

Skeletal muscle (GTOs)

Motor Function

Question 5

What is the Alternative Classification?

A-β and A-γ

General Classification

Answer 5

II (Flower-spray endings)

Alternative Classification

Question 6

What is the Motor Function?

A-β and A-γ

General Classification

Answer 6

Muscle Spindle

Motor Function

Question 7

What is the Alternative Classification

A-δ

General Classification

Answer 7

III: Temperature, crude touch, and prickling pain sensations

Alternative Classification

Question 8

Alternative Classification

C

General Classification

Answer 8

IV: fibers carrying pain, itch temperature, and crude touch

Alternative Classification

Question 9

What is the Motor Function?

C

Answer 9

Sympathetic fibers

Motor Function

Question 10

Sensory Receptors

Detect mechanical compression or stretching

Answer 10

Mechanoreceptors

Question 11

Sensory Receptors

Detect changes in temperature

Answer 11

Thermoreceptors

Question 12

Sensory Receptors

Detect physical-chemical damage

Answer 12

Nociceptors

Question 13

Sensory Receptors

Detect light on the retina of the eye

Answer 13

Electromagnetic receptors

Question 14

Other Sensations

Relates to physical state of the body

Answer 14

Proprioceptive sensation

Question 15

Other Sensations

Viscera of the body

Answer 15

Visceral sensation

Question 16

Other Sensations

Deep tissues

Answer 16

Deep sensation

Question 17

Tactile Receptors

Touch, pressure, tickle, and itch, pain

Answer 17

Free Nerve Endings

Question 18

Tactile Receptors

Present in the non-hairy parts of the skin

Localized touch, texture, and low frequency vibration, surface movement

Answer 18

Meissner’s Corpuscles

Question 19

Tactile Receptors

Slow adaptation

Continuous touch, localized touch, texture

Answer 19

Merkel’s Discs

Question 20

Tactile Receptors

Deeper internal tissues and joints

Heavy prolonged touch, pressure, and degree of joint rotation, heat

Answer 20

Ruffini’s Endings

Question 21

Tactile Receptors

Beneath the skin and deep in the fascial tissues

High-frequency vibration and pressure

Answer 21

Pacinian Corpuscles

Question 22

Sensory Pathways

Carries signals upward to the medulla of the brain mainly in the dorsal columns of the cord.

Then, after the signals synapse and cross to the opposite side in the medulla, they continue upward through the brain stem to the thalamus by way of the medial lemniscus

Answer 22

DORSAL COLUMN- MEDIAL LEMNISCUS PATHWAY

Question 23

composed of large, myelinated nerve fibers that transmit signals to the brain at velocities of 30 to 110 m/sec

Answer 23

DORSAL COLUMN- MEDIAL LEMNISCAL SYSTEM

Question 24

Synapse in the dorsal horns of the spinal gray matter, then cross to the opposite side of the cord and ascend through the anterior and lateral white columns of the cord. They terminate at all levels of the lower brain stem and in the thalamus

Answer 24

ANTEROLATERAL SYSYTEM

Question 25

Composed of smaller myelinated fibers that transmit signals at velocities ranging from a few meters per second up to 40 m/sec

Answer 25

ANTEROLATERAL SYSYTEM

Question 26

Transmit a broad spectrum of sensory modalities, such as pain, warmth, cold, and crude tactile sensations

Answer 26

ANTEROLATERAL SYSYTEM

Question 27

Primary sensory cortex/ somesthetic area

Located: postcentral gyrus

Answer 27

BRODMANN AREA 3,1,2

Question 28

The primary sensory projection cortex for sensory information received from the skin, mucosa, and other tissues of the body and face

Answer 28

Brodmann Area 3,1,2

Question 29

From the thalamic radiations, this area receives fibers that convey touch and proprioceptive (muscle, joint, and tendon) sensations from the opposite side of the body

Answer 29

Brodmann Area 3,1,2