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Patho Ch. 13
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Undergraduate 4
03/01/2012

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Term
sensory/discriminative system for pain
Definition
processes information about strength, intensity, and temporal and spacial aspects of pain
Term
motivational/affective system for pain
Definition
determines individual's approach/avoidance behaviors
Term
cognitive/evaluative system
Definition
determines the individual's learned behavior concerning the experience of pain
Term
somatogenic pain
Definition
pain with a cause
Term
psychogenic pain
Definition
pain with no physical cause
Term
acute pain
Definition
associated with condition immediately harmful to body
Term
chronic pain
Definition
persistent (lasting 6 months) pain
Term
pain threshold
Definition
point where stimulus is perceived as pain
Term
pain tolerance
Definition
duration of time or intensity of pain an individual will endure before initiating overt pain responses
Term
sensory neurons (nociceptors)
Definition
found in the muscles, tendons, subcutaneous tissue (Pacinian corpuscles), and epidermis (Meissner corpuscles). Circulatory systems of abdominal, pelvic, and thoracic viscera
Term
transduction
Definition
conversion of painful stimuli into action potential
Term
transmission
Definition
movement along neurons to CNS
Term
perception
Definition
brain becomes aware of pain signals
Term
Central nervous system (CNS)
Definition
involves limbic system, reticular formation, thalamus, hypothalamus, and cortex
Term
efferent pathways
Definition
responsible for modulation or inhibition of afferent pain signals
fibers connect reticular formation, midbrain, and substantia gelantinosa
impulses are then transmitted through spinal cord to the dorsal horn
Term
somatic pain
Definition
superficial
sharp and well localized or dull, aching, poorly localized
Term
visceral pain
Definition
pain in internal organs, abdomen or skeleton
poorly localized
Term
referred pain
Definition
pain in area removed or distant from point of origin
Term
physiological responses with acute pain
Definition
increased heart rate and respiratory rate, elevated blood pressure, dilated pupils, diaphoresis, increased blood sugar, and decreased blood flow to viscera and skin
Term
psychologic and behavioral response with acute pain
Definition
fear, anxiety, sense of uneasiness
Term
chronic pain
Definition
may be persistent or intermittent
Term
physiological responses with chronic pain
Definition
intermittent pain produces response similar to acute
persistent pain allows adaptation
Term
psychologic and behavioral response with chronic pain
Definition
depression, difficulty sleeping, preoccupation with the pain
Term
hyperesthesias
Definition
characterized by increased sensitivity and decreased pain threshold to tactile and painful stimuli
may be result of chronic irritation of thalamus
Term
myofascial pain syndrome
Definition
2nd most common
invovle injury to muscle and fascia
pain result of muscle spasm, tenderness, and stiffness
leads to muscle guarding limiting muscle motion
Term
What's the most common chronic pain?
Definition
low back pain
Term
neuralgias
Definition
condition resulting from infection or disease damaging peripheral or cranial nerve
Term
causalgia
Definition
causes severe buring pain after injury to the brachial plexus, median nerves, or sciatic nerves
triggered by touch, sound, and cold
Term
reflex sympathetic dystrophies
Definition
occur after peripheral nerve injury
characterized by continuous severe, burning pain, vasospasms and vasomotor changes
Term
hemiagnosia
Definition
loss of ability to identify source of pain on one side of body
associated with stroke
produces anxiety, moaning agitation, and distress
Term
phantom limb pain
Definition
pain individual feels in amputated limb
may be influences by emotions and sympathetic stimulation--> trigger points
Term
radiation
Definition
loss through electromagnetic waves
Term
conduction
Definition
heat loss through direct contact with cooler air or water
Term
convection
Definition
transfer of heat through currents of gases or liquids
Term
vasodilation
Definition
diverts core-warmed blood to surface of body
Term
decreased muscle tone
Definition
low voluntary muscle activity
Term
evaporation
Definition
sweating may cause loss of 4 L per hour--use electrolytes too
Term
increased respiration
Definition
minimal
Term
voluntary mechanisms
Definition
proper dress, slowing activity, stretching out
Term
adaptation of warmer climates
Definition
adaptation resulting in earlier onset of sweating, increased sweat production, and decreased sodium content
heart rate is decreased and stroke volume increased
Term
hyperthermia
Definition
marked warming of core temperature
can produce nerve damage, coagulation of cell proteins, and death
Term
heat cramps
Definition
severe, spasmodic cramps in the abdomen and extremities following prolonged sweating and sodium loss, fever, rapid pulse, elevated BP
Term
heat exhaustion
Definition
result of prolonged high core or environmental temperatures
result in excessive losses of salt and fluid from body
weak, dizzy, nauseous, faint
Term
heatstroke
Definition
a severe, life threatening condition resulting from prolonged exposure to heat
regulatory center may cease to function resulting in stoppage of sweating, irritable, confused, stuporous, comatose
core temp: 105 F
Term
malignant hyperthermia
Definition
potentially lethal complication of inherited muscle disorder
caused by increased calcium release or decreased calcium uptake with muscle contractions
results in increased muscular contractio nand lactic acid production producing acidosis and increased temperature
occurs most in children and young adults after induction with anesthesia
Term
hypothermia
Definition
marked cooling of core temperature--vasoconstriction, alterations in microcirculation, coagulation and ischemic tissue damage
**ice crystals can form inside cells
Term
accidental hypothermia
Definition
result of sudden immersion of cold water or prolonged exposure to cold environment
Term
therapeutic hypothermia
Definition
used to slow metabolism and preserve ischemic tissue during surgery or limb reimplantation
Term
CNS trauma
Definition
usually produces fever greater than 102 F
Term
accidental injuries
Definition
mild may produce slight elevation in core temperature
moderate to severe result in decreased surface and core temperature
Term
hemorrhagic shock
Definition
results in slight rise in core temperature
triggers peripheral vasoconstriction
Term
major surgery
Definition
may induce hypothermia
Term
thermal burns
Definition
produce significant hypothermia
Term
Non-REM sleep Stage I:
Definition
somewhat aware of surroundings
feel relaxed and dreamy
may jump or jerk
Term
Non-REM sleep Stage II:
Definition
unaware of surroundings but awaken easily
Term
Non-REM sleep stage III:
Definition
unaware of surroundings but awaken easily
(little bit deeper sleep)
Term
What waves appear in EEG on Non-REM sleep Stage I?
Definition
alpha waves
Term
What waves appear in EEG on Non-REM sleep Stage II?
Definition
spindle waves
Term
What waves appear in EEG on Non-REM sleep Stage III?
Definition
delta waves
Term
Non-REM sleep stage IV:
Definition
deeply asleep
difficult to awaken
exhibit little body movement
decrease in heart rate, respiratory rate, and blood pressure
Term
REM sleep
Definition
occurs about every 90 minutes
Term
Tonic REM sleep
Definition
rapid eye movement present
other muscle activity suppressed
Term
Phasic REM sleep
Definition
rapid eye movement present
muscle contraction and movement occur
Term
Insomnia:
Definition
disorders of initiating sleep
inability to fall or stay asleep
may result from pain, discomfort, depression, changes in presleep routine, or excessive REM-suppressant drugs
Term
Disorders of excessive somnolence
Definition
excessive daytime sleepiness
affects more men than women
Term
Pickwickian syndrome
Definition
involves extremely obesity and hypersomnia associated with periodic breathing
Term
Hypersomnia sleep apnea (HSA) syndrome
Definition
result of upper airway obstruction occuring during sleep
Term
somnambulism
Definition
sleep walking; disorder of childhood; occurs during stages III and IV
Term
night terrors
Definition
dream anxiety attacks; occur during stage IV; not associated with dream state
Term
enuresis
Definition
bedwetting most frequently occurs during non-REM sleep
Term
conjuctivitis
Definition
inflammation of conjunctiva caused by bacteria, viruses, allergies, or chemical irritations
may be classified as acute bacterial, viral, allergic, chronic, or trachoma
Term
keratitis
Definition
infection of cornea by bacteria and viruses
Term
blepharitis
Definition
inflammation of eyelids
Term
strabismus
Definition
deviation of one eye from the other when person is looking at an object
Term
nystagmus
Definition
involuntary unilateral or bilateral rhythmic movement of the eye
may be pendular or jerk
Term
paralyiss of extraocular muscles
Definition
may cause limited abduction, abnormal closure of eyelid, ptosis, and diplopia
Term
amblyopia
Definition
reduction or dimness of vision
Term
scotoma
Definition
area of depressed vision in central field of vision
Term
cataract
Definition
development of opacities of ocular lens
Term
papilledema
Definition
edema and inflammation of the optic nerve where it enters the eyeball
Term
glaucoma
Definition
increased intraocular pressure
causes loss of peripheral vision followed by central vision impairment and blindness
three types: open angle, narrow angle, and acute angle closure
Term
presbyopia
Definition
loss of accomodation
lnes becomes larger, firmer, and less elastic
Term
myopia
Definition
nearsightedness
Term
hyperopia
Definition
farsightedness
Term
astigmatism
Definition
uneven bending of light rays on retina
Term
hemianopia
Definition
defective vision in half a visual field
Term
diplopia
Definition
double vision
Term
homonymous hemianopia
Definition
complete loss of vision in inner half of one eye and outer half of other
Term
hyposmia
Definition
impaired sense of smell
Term
anosmia
Definition
complete loss of smell
Term
olfactory hallucinations
Definition
smelling odors that aren't really present
Term
parosmia
Definition
abnormal or perverted sense of smell
Term
hypogeusia
Definition
decrease in taste sensation
Term
ageusia
Definition
absense of taste sensation
Term
parageusia
Definition
perversion of taste
substance possess unpleasant flavor
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