Autonomic Function + Circadian Rhythms Flashcards
What type of neurosecretory neurones release hormones into hypophyseal portal system?
Parvocellular
Small
What type of neurosecretory cells in hypothalamus project axons into posterior pituitary?
Magnocellular
Large
Where does the majority of PARASYMPATHETIC innovation arise from?
What is the exception?
Brain stem
Bladder (innervation arises from sacral spinal cord)
What no. cranial nerve is the vagus nerve?
10
Do blood vessels have any parasympathetic innervation?
No, only sympathetic
Where does sympathetic innervation arise from?
Spinal cord (thoracic and lumber)
Sympathetic preganglionic neurones are located in lateral horn if spinal cord, a.k.a?
Intermedio-lateral column
What part of brainstem receives afferent input and controls parasympathetic and sympathetic outputs?
Nucleus of solitary tract
In response to increased BP, Nucleus of Solitary Tract:
- stimulates/inhibits parasympathetic?
- stimulates/inhibits sympathetic?
Stimulates parasympathetic Inhibits sympathetic (-> vasodilation)
What plexus is key in the enteric NS?
Myenteric plexus
What part of hypothalamus controls circadian rhythms?
Suprachiasmic Nucleus
What is the sleep promoting hormone released from the pineal gland?
Is more released in light/dark?
Melatonin
Dark
What is the system that controls alertness?
Ascending reticular activating system
What hormones are activated during wakefulness?
NA, 5-HT, Histamine
What type of EEG waves are present when awake?
Beta
