Short Term Regulation of Arterial Blood Pressure Flashcards
Sympathetic Nervous System
(Fight or Flight)
Integrators
Subthalamic Locomotor Region, Cardiovascular Control Center (CVC)
Subthalamic Locomotor Region
Control Center
Subthalamic Locomotor Region Affects
Heart Rate, Arterial BP, LV Contractility
Subthalamic Locomotor Region Mechanism of Control
CVC
Subthalamic Locomotor Region Functions
Motor unit recruitment, Ventilatory Control
Cardiovascular Control Center (CVC)
Reticular Formation (Medulla and Pons; Effector arm of circulatory control (Efferent)
How many loose cnx of nerves are in medulla?
5 main areas (Pressor, Depressor, Cardioacceleration Center, Cardioinhibitory Center, Nucleus Tractus Solitarius
Pressor Area (cnx of nerves in medulla)
Increase BP via Increased Vasoconstriction (Increase Sympathetic Tone)
Depressor Area (cnx of nerves in medulla)
Reverse of Pressor (Decrease Sympathetic Tone)
Cardioacceleration Center (cnx of nerves in medulla)
Decrease HR (Via Cardiac Accel. Nerves)
Cardioinhibitory Center (cnx of nerves in medulla)
Decrease Heart Rate (Via Vagus Nerves)
Nucleus Tractus Solitarius (NTS) (cnx of nerves in medulla)
Receives afferent feedback from chemoreceptors and baroreceptors
What is the CVC effector?
The ANS
Afferents
Hypothalamus, Chemoreceptors, Baroreceptors, Muscle Afferents