The heart is innervated by vagal and sympathetic fibers. The right vagus nerve primarily innervates the SA node, whereas the left vagus innervates the AV node; however, there can be significant overlap in the anatomical distribution. Atrial muscle is also innervated by vagal efferents, whereas the ventricular myocardium is only sparsely innervated by vagal efferents. Sympathetic efferent nerves are present throughout the atria (especially in the SA node) and ventricles, including the conduction system of the heart.
Coronary heart diseaseCardiomyopathyCardiovascular diseaseIschemic heart diseaseHypertensive heart diseaseInflammatory heart diseaseValvular heart diseaseHeart Cancer
Coronary heart diseaseCardiomyopathyCardiovascular diseaseIschemic heart diseaseHeart failureHypertensive heart diseaseInflammatory heart diseaseValvular heart diseaseHeart cancers
The apex of the heart is inferior to the rest of the heart. The base is superior to the rest of the heart.
Abnormal heart rhythm is a problem in the electrical system of the heart Heart Murmur- is a heart sound associated with a valve problem
The heart enlarges to compensate for conditions in the body that affect heart flow and functions of the heart. It would be more telling to know which side of the heart is enlarged or if the whole heart.
The brain and spinal cord send messages to the heart and blood vessels via the peripheral nervous system, specifically the sympathetic and parasympathetic divisions. The sympathetic nervous system innervates the heart and causes an increases heart rate and force of contraction; it also innervates the blood vessels and can produce either constriction of the blood vessels or relaxation. The parasympathetic nervous system innervates the heart as well, but reduces heart rate and force of contraction. With few exceptions, the parasympathetic nervous system does not innervate the blood vessels. As a consequence of this innervation, the peripheral nervous system regulates heart rate and blood pressure.
innervates SA and AV nodes, heart muscle, and coranary arteries through parasympathetic fibers in the vagus nerves
The sympathetic division innervates the sweat glands and hair follicles.
The Ventral Ramus innervates the ventrolateral structures and limbs.
The sympathetic division innervates the sweat glands and hair follicles.
OBTURATOR
Sensory
Cranial Nerve V
cranial nerve3
sciatic nerve
The optic nerve (purely sensory; carry afferent impulses for vision) Oculomotor (innervates four of the extrinsic eye muscles) Trochlear (innervates an extrinsic eye muscle that hooks through a pulley-shaped ligament in the orbit) Abducens (innervates the muscle that turns abducts the eyeball)
The autonomic nervous system regulates the cardiovascular system. The parasympathetic division innervates the heart via the vagus nerve. The sympathetic division also innervates the heart, but additionally, it supplies innervation to the smooth muscle lining blood vessels. The sympathetic division has a substantial effect on blood pressure, and on local blood flow, via constriction of arterioles.The cardiovascular system is important to maintain supply of oxygen and nutrients, and removal of wastes, from the nervous system.