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SPE 717 - Chapter 10 Somatosensory System | PHYS - Neuroanatomy & Physiology, Quizzes of Physiology

Class: PHYS - Neuroanatomy & Physiology; Subject: Physics; University: CUNY Lehman College; Term: Forever 1989;

Typology: Quizzes

2014/2015

Uploaded on 12/15/2015

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TERM 1
What is somatosensation?
DEFINITION 1
bodily experienced external and internal sensations
includes sensations of 1) pain, 2) temperature, 3) touch,
and 4) proprioception
TERM 2
Where do the receptors of somatosensation
begin and how do they transmit info?
DEFINITION 2
Receptors begin in the 1) skin, 2) muscles, 3) joints, and 4)
blood vessels that convert sensation to neural signals and
transmit them to the spinal cord and into the sensory cortex
in the parietal lobe.
TERM 3
What is proprioception?
DEFINITION 3
Internal awareness of position, posture, and
movement*important for speech and language because
we need to be aware of our speech articulators and
for writing because we need to be aware of limb
movement.
TERM 4
What is stereognosis?
DEFINITION 4
the analysis and identification of objects through
touch/tactile manipulation
TERM 5
Graphesthesia
DEFINITION 5
the recognition of figures and numbers written on the body
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What is somatosensation?

bodily experienced external and internal sensations includes sensations of 1) pain, 2) temperature, 3) touch, and 4) proprioception TERM 2

Where do the receptors of somatosensation

begin and how do they transmit info?

DEFINITION 2 Receptors begin in the 1) skin, 2) muscles, 3) joints, and 4) blood vessels that convert sensation to neural signals and transmit them to the spinal cord and into the sensory cortex in the parietal lobe. TERM 3

What is proprioception?

DEFINITION 3 Internal awareness of position, posture, and movement *important for speech and language because we need to be aware of our speech articulators and for writing because we need to be aware of limb movement. TERM 4

What is stereognosis?

DEFINITION 4 the analysis and identification of objects through touch/tactile manipulation TERM 5

Graphesthesia

DEFINITION 5 the recognition of figures and numbers written on the body

What is fine discriminative touch? What types

of discrimination does it include?

Awareness of touch discrimination between two or more multiple points of touch stereognosis graphesthesia TERM 7

What are some types of somatic sensation?

DEFINITION 7 Mechanoreception Thermoreception Nociception TERM 8

Mechanoreception

DEFINITION 8 touch pressure vibration (tactile) kinesthesia and proprioception Divided into fine discriminative touch (localizable) and diffuse (unlocalizable) TERM 9

Kinesthesia

DEFINITION 9 Internal awareness of the range and direction of limb movements TERM 10

Thermoreception

DEFINITION 10 Sensations of cold and heat

What types of sensations are detected by free

nerve endings?

sensations of pain and temperature TERM 17

Where are free nerve endings most

commonly distributed?

DEFINITION 17 Body Skin Cutaneous Tissue Visceral Organs TERM 18

Free Nerve

Endings

DEFINITION 18 Respond by sending signals at a slow rate for a long periode.g. think of feeling of heat after having touched the stove. TERM 19

Where are expanded tip endings most

commonly distributed?

DEFINITION 19 The dermis and joints TERM 20

What sensations are mediated by expanded

tip endings?

DEFINITION 20 touch temperature pressure

Expanded Tip

Endings

Transmit slowly and are moderately adaptive TERM 22

Division of Somatosensory System

DEFINITION 22 Dorsal column medial leminiscal system Anterolateral system TERM 23

The Dorsal Column Medial Leminiscal System

(DCMLS) is also known as

DEFINITION 23 Epicritic System TERM 24

What sensations does the DCMLS mediate?

DEFINITION 24 postural position - both conscious and unconscious fine discriminative touch vibration kinesthesia proprioception TERM 25

What are the neural pathways of the DCMLS?

DEFINITION 25 Two Fasciculi fasciulus gracilis fasiculus cuneatus These two follow the same neural pathways.

What are clinical correlates of damage to the

DCMLS?

sensory loss cognitive deficits tactile agnosia astereognosis TERM 32

Astereognosis

DEFINITION 32 interchangeable with tactile agnosia the most extreme form: patient ignores existence of one side of the body and/or corresponding visual fields TERM 33

What is the anterolateral system also known

as?

DEFINITION 33 Protopathic system TERM 34

What is the anterolateral system divided into?

DEFINITION 34 lateral spinothalamic tract anterior spinothalamic tract TERM 35

Lateral spinothalamic tract

DEFINITION 35 carries sensation of pain and temperature begins with receptors of the skin

Results of damage to the lateral

spinothalamic tract

alteration in the perception of pain and temperature phantom limb TERM 37

What are types of altered responses to pain?

DEFINITION 37 Analgesia Hypalgesia Hyperalgesia TERM 38

Analgesia

DEFINITION 38 No sensation of pain TERM 39

Hypalgesia

DEFINITION 39 Decreased sensation of pain or higher pain treshold TERM 40

Hyperalgesia

DEFINITION 40 increased pain sensation

What is known as the trigeminal system?

Maxillary branch opthalamic branch mandibular branch TERM 47

What is the principal sensory nerve for the

face and head?

DEFINITION 47 Trigeminal nerve - cranial nerve V TERM 48

What areas does the trigeminal

system/cranial nerve V mediate sensations

from?

DEFINITION 48 mediate sensations from skin of the face, forehead, anterior half of scalp, most of your orbital cavities TERM 49

What are clinical correlates of the Trigeminal

system?

DEFINITION 49 Trigeminal neuralgia TERM 50

Trigeminal neuralgia

DEFINITION 50 excruciating pain in the ipsilateral half of the face- could be a sign of MS

What is the backup for conscious

proprioception?

Tracts of unconscious proprioception*clinical correlates of these tracts are hard to determine TERM 52

What tracts manage unconscious

proprioception and from where?

DEFINITION 52 ventral spinocerebellar tract dorsal spinoverebellar tract cuneocerebellar from muscles and joints TERM 53

Where is conscious proprioception mediated?

DEFINITION 53 DCMLS