Neuroanatomy Flashcards
What are the tissues surrounding nerves called?
Mechanical interfaces
Name the key neural structures in the nervous system.
Brain, spinal cord, nerve roots, peripheral nerves, meninges, epi/meso/perineurium
Are neuriums associated with nociceptive or neurogenic pain?
Nociceptive
What tissues are innervated by nerves?
All other tissues in the body
What is the main defense against excessive nerve tension?
Perineurium
How much strain can the perineurium withstand before failure?
18-22%
What allows for the sliding movement of neural tissues?
Longitudinal and transverse excursion
How does the ulnar nerve slide during wrist extension?
Around the elbow
What is the function of transverse nerve sliding?
Allows nerves to take the shortest path and accommodate pressure
What structural feature helps nerves recover after compression?
Spongy epineurium
Which substances are released during nociceptive stimulation to increase INBF?
Substance P and vasodilating peptides
What happens to INBF with excessive mechanical stimulation?
Inflammation or edema
How does the sympathetic nervous system affect INBF?
Causes vasoconstriction
At what elongation percentage is nerve blood flow first blocked?
0.08
What elongation percentage stops blood flow in nerves completely?
0.15