Cardiac effect of parasympathetic stimulation Parasympathetic stimulation Before vagal stimulation During vagal stimulation ga 八AAA 75 50 且2 八 01 3.4.50.12345 Ime
Cardiac effect of parasympathetic stimulation
Interaction of sympathetic and ymp parasympathetIc NE nerves ACh ATP GTP GDP NE NPY - ACh
Interaction of sympathetic and parasympathetic nerves
Predominance of autonomic nerves 120 110 Propranolol e100 At pIne 90 80 70 60 Propranolol Atropine 50 Control 1 First drug administered Second drug administered
Predominance of autonomic nerves
Cardiovascular center A collection of functionally similar neurons that help to regulate HR, Sv, and blood vessel tone
Cardiovascular Center A collection of functionally similar neurons that help to regulate HR, SV, and blood vessel tone
Vasomotor center Located bilaterally mainly in the reticular substance of the medulla and of the lower third of the pons Vasoconstrictor area Vasodilator area Cardioinhibitor area -dorsal nuclei of the vagus nerves and ambiguous nucleus Sensory area -tractus solitarius
Vasomotor center Located bilaterally mainly in the reticular substance of the medulla and of the lower third of the pons – Vasoconstrictor area – Vasodilator area – Cardioinhibitor area – dorsal nuclei of the vagus nerves and ambiguous nucleus – Sensory area – tractus solitarius