NS Reading

Question 1

Myelinated axons - white; have gaps: nodes of Ranvier
Nonmyelinated - gray

Answer 1

Nervous sys cells: structure and func

Question 2

Dementia - chronic confusional state/syndrome - gen term progressive loss of brain func and impaired cognition
Alzheimer’s disease - most common type dememntia typically affects older 65 yrs
Affects person’s ability learn new info and eventually impairs language, judgment, behavior

Answer 2

Alzheimer’s disease

Question 3

Progressive neurodegenerative disease one most common neurologic disorders of older adults
Debilitating disease affecting mobility
4 cardinal signs: tremor, muscle rigidity, bradykinesia, postural instability
Interferes with movement as a result of dopamine loss in brain

Answer 3

Parkinson’s disease

Question 4

Abnormal, sudden, excessive, uncontrolled electrical discharge of neurons within the brain that may result in change in LOC, motor/sensory ability, and/or behavior

Answer 4

Seizures

Question 5

Is an infection of meninges of the brain and SC, specifically pia mater and arachnoid

Answer 5

Meningitis

Question 6

Caused by immune, genetic, and/or infectious factors that affects myelin and nerve fibers of brain and SC
Leading causes disability
Demyelination

Answer 6

MS

Question 7

Classifed as incomplete/complete
Incomplete: some func or movement below level injury; more common
Complete: SC damaged eliminates all innervations below level injury

Answer 7

SCI

Question 8

Arise anywhere within the brain structures and named according to the cell/tissue where originate
Primary - within CNS
Secondary - metastasis
Compress and displace normal brain tissue
Cerebral edema results

Answer 8

Brain tumors