Sympathetics Flashcards
Cardiac branches (direct visceral structures-thoracic) extend to the heart from T2-T4 and have 3 affects?
Increase heart rate
Dilate coronary arteries
Afferent
The parasympathetics of the pulmonary plexus arrive there via the _____ and _______ ________ branches of the ______ nerve
Anterior and posterior bronchial branches of the vagus nerve
The medial internal carotid nerve forms the cavernous plexus which has fibers that travel through the _____ _____ to reach the _______ and supply the ____ and _____ ____ muscles as well as some tarsus muscles of the upper eyelid
Ciliary ganglion
Eyeball
Ciliaris and dilator pupillae
The medial internal carotid nerve forms the cavernous plexus which has branches to the ______ division of the _____ nerve to supply arrector pilli, sweat glands, and blood vessels in the field of distribution.
Opthalamic division of the trigeminal nerve
What forms the lesser splanchnic nerve?
Fibers from 9th/10th or 10th/11th ganglia
T5-T12 give rise to axons that supply what?
Abdominal viscera
Branches from the sacral sympathetic trunk that accompany nerves
Gray ramus communicans ( each sacral and coccygeal nerve)
-supply arrector pilli, sweat glands, blood vessels
What does the inferior cervical ganglion communicate with?
Anterior primary rami of C7 and C8 (T1 if stellate) via gray rami communicans
Where are branches from the inferior cervical ganglion sent?
Subclavian artery and form plexuses around it and its branches (axillary/vertebral)
Sympathetic trunk carries _____ and _____ fibers
Ascending and descending
Sympathetic trunk extends from _____ _____ _____ inferior to the ganglion impar
Superior cervical ganglion
The efferent response to the stretch reflex sends signals to detrusor muscle or rectal musculature and causes what?
Relaxation of external sphincter muscles
What type of fibers does the greater splanchnic nerve supply the thoracic aortic plexus with?
Sympathetic
What does the cardiac plexus supply?
Myocardium
Great vessels at base of heart
Coronary arteries
All nerves carry postganglionic sympathetic fibers that have what 3 fields of distribution?
Vasoconstriction
Sudomotor
Motor to arrector pilli
What fibers are sensitive to and initiate the stretch reflex during defecation and micturation?
Visceral afferent sensitive to stretching of walls of bladder and rectum
What does the thoracic aortic plexus consist of?
Vagus N (sensory and visceral afferent)
greater splanchnic N (sympathetic)
T1-T5 sympathetic ganglia (vascular)
The cervical sympathetic trunk lies between the ____ ____ and what two muscles?
Carotid sheath
Longs collision and capitis muscles
Postganglionic branches from the superior cervical ganglia are distributed in what branches?
Anterior, medial or lateral
What two plexuses does the superior hypogastric plexus include?
Abdominal aortic and inferior mesenteric
Vascular branches of the lumbar sympathetic trunk that accompany blood vessels are given off and follow _____ _____ back to the abdominal aorta and then follow it down as low as the ____ ____ ____ and the _____ _____ _____
Lumbar arteries
Medial sacral artery and common iliac arteries
Where does the lumbar sympathetic trunk lie?
Retroperitoneal space on the lateral aspect of lumbar vertebrae
What plexus is located between L4-S1
Superior hypogastric
There are usually _____ ganglia in each trunk. ____ cervical, _____ thoracic, ______ lumbar, and ____ sacral ganglia
21 or 22 3 cervical 11 thoracic 4 lumbar 4 sacral