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Exam 3 Material
Disorders of Muscles
23
Psychology
Undergraduate 2
04/04/2014

Additional Psychology Flashcards

 


 

Cards

Term
Muscular Dystrophy (MD)
Definition
refers to disorders that lead to degeneration and changes in muscle structure
Term
Dystrophin
Definition

a protein needed for normal muscle function

 

- produced by a gene on the X chromosome

Term
Polioviruses
Definition
destroy spinal motoneurons and sometimes cranial motoneurons
Term
Myasthenia Gravis
Definition

an autoimmune disorder, where the patient develops antibodies to his own ACh receptors

 

- characterized by a weakness of skeletal muscles

Term
Amyotrophic Lateral Sclerosis (ALS)
Definition

Lou Gehrig's disease; degeneration of motoneurons and the subsequent loss of their target muscles

 

- a rare form is heritable, but there are other causes

Term
Flaccid Paralysis
Definition
reflexes below the level of the injury are lost
Term
1. Provide stem cells, to differentiate into new neurons
2. Transplant glial cells to promote regeneration
3. Neurotrophic factors/adhesion molecules
4. Transplant peripheral nerves
Definition
4 strategies to reconnect a severed spinal cord
Term
Plegia
Definition
paralysis
Term
Paresis
Definition
Weakness of voluntary movements
Term
Apraxia
Definition
inability to carry out movements, although no muscle paralysis
Term
Ideomotor Apraxia
Definition
inability to complete a simple motor activity on command
Term
Ideational Apraxia
Definition
impairment in completing a sequence of tasks, although able to do each step
Term
Parkinson's Disease
Definition

causes tremors, loss of muscle tone, and difficulty in motor movements

 

- patients show degeneration of dopamine-containing cells in the substantia nigra, which project to the striatum

Term
L-Dopa
Definition
a precursor to dopamine, and its use reduces some symptoms of Parkinson's disease
Term
Huntington's Disease
Definition

also caused by basal ganglia damage, but shows excessive movement (tics)

 

- progressive destruction takes place in the caudate nucleus and putamen

Term
Spinocerebellum
Definition
uppermost part of the cerebellum; receives information about body location in space and anticipates movement
Term
Spinocerebellar Damage
Definition

results in abnormalities of gait and posture

 

- ataxia may appear in the legs

Term
Ataxia
Definition
loss of coordination
Term
Cerebrocerebellum
Definition
the lowermost part of the cerebellum; implicated in planning complex movements
Term
Decomposition of Movement
Definition
describes gestures made in segment, not smoothly
Term
Cerebrocerebellum Damage
Definition
causes cognitive deficits
Term
Vestibulocerebellum
Definition
the middle part of the crebellum; receives information about body orientation and helps to maintain posture and orientation to the external world
Term
Vestibulocerebellar Damage
Definition
produces errors in gaze and difficulty tracking visual objects
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