Flashcards in Peripheral Nervous System and the Spinal Cord Deck (133)
Autonomic nervous system functions
Cranial nerve II
Optic. Sensory. Sight
How can the BBB potentially be opened or weakened?
high blood pressure, microwaves, ultrasonic waves, radiation, infection, injury (stroke, inflammation, pressure)
Blockage of CSF flow usually at narrow points in the passage
How is blood supplied to the brain anteriorly?
Spinal nerve regions for sympathetic and parasympathetic
Sympathetic = thoracic/lumbar
Parasympathetic = cranial/sacral
Cranial nerve VIII
Vestibulocochlear/auditory. sensory. inner ear
Same side of the midline
What does the blood brain barrier do?
Excludes some molecules from passing easily
Far from the center
Opposite sides of the midline
CSF path of flow
Ventricles down the spinal cord and up and around the cortex
What molecules are allowed through the BBB via passive diffusion?
water, some gasses like O2 and CO2, and lipid soluble molecules
What are the cerebral ventricles filled with?
Why is there left arm pain during a heart attack and who does it occur in?
Its linked to a spinal nerve and is pretty much only in males
How much CSF is replenished and how often?
100-150 mL at a time, replenished 3x a day
What are the 4 cerebral ventricles?
Lateral ventricles, third ventricle and fourth ventricle
What molecules are allowed through the BBB via active transport (protein channel)?
glucose and amino acids
Cranial nerve condition causing temporary paralysis of one side of face
Where does CSF exit into the bloodstream?
Superior sagittal sinus
How is the BBB related to Alzheimer's?
Research is showing that the BBB is leaky in Alzheimer's
How is blood supplied to the brain posteriorly?
Vertebral arteries at base of skull
What do the sympathetic and parasympathetic pathways use at targets
Sympathetic uses NE and parasympathetic uses ACh
Functions of the somatic nervous system
Fight or flight response
What procedures are done on the meninges?
Spinal tap and epidural
Towards the midline
2nd synapse NT of sympathetic and parasympathetic
NE in sym and ACh in parasym
NTs of autonomic nervous system
ACh and NE