Block 1 Unit 5 Neurological System Flashcards
What is the function of gray matter?
Receive, integrate, store and transmit information
What is the outmost layer of cell bodies of neurons within the cerebral cortex?
Grey matter
What is the inner most layer composed of myelinated nerve fibers calledaxons?
White matter
What is the function of white matter?
The framework and support of the neurologic system which provides support, protection, and nourishment to the neurons
What is the Blood Brain Barrier and it’s purpose?
A highly selective, semipermeable border of endothelial cells that maintain the delicate metabolic balance in the CNS.
It regulates the transport of nutrients, ions, water, and waste products through selective permeability
What is the Vestibulo-Ocular reflex test?
A test that stimulates the acoustic nerve by delivering cold water into the ear canal
What should happen during the Vestibulo-Ocular reflex test?
When cold water enters the ear and the inner ear hanged temperature, it should cause fast, side to side eye movement (nystagmus)
What is the Vestibulo-Ocular reflex testing for?
To see if there’s damage to the acoustic nerve
What is a abnormal Vestibulo-Ocular reflex test result?
No nystagmus, may point to acoustic nerve damage to the ears balance sensors and or brain damage
What causes pinpoint/ nonreactive pupils in patients?
Pontine lesion, or medication such as opiates
What causes midsize/ nonreactive pupils in patients?
Could be a midbrain lesion
What causes unilateral large >6mm and or a blown pupil and is nonreactive in patients?
Pressure on the theoculomotor nerve on the same side as the eye
What causes bilateral large/ nonreactive pupils in patients?
Brain stem lesion or herniation
What causes oval shape pupils in patients?
Increased ICP (18-35mmhg)
What causes irregular shaped pupils in patients?
Cataracts or trauma
What is a intracranial pressure monitor fiber optic bolt?
A bolt with a Fiber optic wire is placed in the brain to measure ICP.