Autonomic Function And Carcadian Rhythmns Flashcards
What does the enteric nervous system mainly consist of?!
The myenteric plexus
What follows stage IV?!
Rapid eye movement stage
How does the baroreflex work?!
High blood pressure causes stretching of the receptors in the aorta and carotid artery, this stimulates the parasympathetic division and causes blood pressure to decrease
Can happen in reverse Eg. If the blood pressure is too low
What is the main nerve in the parasympathetic division and where does it arise?!
Vagus nerve
Brainstem
Where does the parasympathetic preganglionic axon arise?!
The sacral cord and brainstem
Where does the enteric nervous system receive autonomic innervation from?!
Vagus and sympathetic chain
Does parasympathetic increase or decrease gut motility?!
Increase but everything else is decreased
What waves are sent in stage IV?!
Delta
What Is the criteria for a circadian rhythm?!
Repeat once a day
Can be adjusted to local time
Persist in the absence of external cues
What is the main nucleus involved in circadian rhythms?!
Suprachiasmatic nucleus
What gland is associated with circadian rhythms?!
The pineal gland - releases melatonin which induces a sleepy state
What is removed in knock out mice?!
Connexin 3b
What waves are sent when you are awake?!
Alpha
What does the enteric nervous system do?!
Controls the activity of the GI tract
What does an EEG detect?!
Change in fluid charge
What is REM sleep most similar to?!
Awake
What are the characteristics of REM sleep?!
Physiological functions decrease
Lower motor neurones in the spinal cord are still inhibited
What happens as you go from being awake to stage IV in regards to frequency and amplitude?!
Frequency decreases as amplitude increases
What waves are sent I’m stages I-III?!
Theta
What type of neurones have higher activity during awake and REM sleep?!
Cholinergic
What are the main divisions of the autonomic division?!
Parasympathetic
Sympathetic
Enteric
Where does the preganglionic sympathetic axon arise?!
The thoracolumbar cord
