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Lecture

Cardiac Innervation

In course

BIO-320: Morphology I

Ce cours est une préparation intensive à l'examen d'entrée en 3ème année de Médecine. Les matières enseignées sont la morphologie macroscopique (anatomie), microscopique (histologie) du corps humain. La matière est présentée dans une perspective médicale s ...

Description

This lecture covers the innervation of the heart, including the sympathetic and parasympathetic systems, the cardiac plexus, and the different nerves involved in regulating heart rate and contraction. It explains how the preganglionic fibers reach the heart, synapse in ganglia, and the effects of sympathetic and parasympathetic stimulation on heart function.

Instructor

Romain Zufferey

Official source

Ontological neighbourhood

Biology

Anatomy: Neuroanatomy

Related concepts (29)

Parasympathetic nervous system

The parasympathetic nervous system (PSNS) is one of the three divisions of the autonomic nervous system, the others being the sympathetic nervous system and the enteric nervous system. The enteric nervous system is sometimes considered part of the autonomic nervous system, and sometimes considered an independent system. The autonomic nervous system is responsible for regulating the body's unconscious actions.

Sympathetic nervous system

The sympathetic nervous system (SNS) is one of the three divisions of the autonomic nervous system, the others being the parasympathetic nervous system and the enteric nervous system. The enteric nervous system is sometimes considered part of the autonomic nervous system, and sometimes considered an independent system. The autonomic nervous system functions to regulate the body's unconscious actions. The sympathetic nervous system's primary process is to stimulate the body's fight or flight response.

Peripheral nervous system

The peripheral nervous system (PNS) is one of two components that make up the nervous system of bilateral animals, with the other part being the central nervous system (CNS). The PNS consists of nerves and ganglia, which lie outside the brain and the spinal cord. The main function of the PNS is to connect the CNS to the limbs and organs, essentially serving as a relay between the brain and spinal cord and the rest of the body. Unlike the CNS, the PNS is not protected by the vertebral column and skull, or by the blood–brain barrier, which leaves it exposed to toxins.

Autonomic nervous system

The autonomic nervous system (ANS), formerly referred to as the vegetative nervous system, is a division of the nervous system that supplies internal organs, smooth muscle and glands. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions, such as the heart rate, its force of contraction, digestion, respiratory rate, pupillary response, urination, and sexual arousal. This system is the primary mechanism in control of the fight-or-flight response.

Vagus nerve

The vagus nerve, also known as the tenth cranial nerve, cranial nerve X, or simply CN X, is a cranial nerve that carries sensory fibers that create a pathway that interfaces with the parasympathetic control of the heart, lungs, and digestive tract. It comprises two nerves—the left and right vagus nerves—but they are typically referred to collectively as a single subsystem. The vagus is the longest nerve of the autonomic nervous system in the human body and comprises both sensory and motor fibers.

Related lectures (33)

Innervation of Heart: Anatomy and Mechanisms

Covers the anatomy and innervation of the heart and lungs, including vascularization and cardiac conduction.

Cardiovascular Regulation: Sympathetic and Parasympathetic Systems

Explores the regulation of the cardiovascular system, focusing on sympathetic and parasympathetic influences, cardiac cycle, and vascular resistance.

Cardiovascular Regulation: Sympathetic and Parasympathetic Systems

Explores the regulation of the cardiovascular system, emphasizing the role of the sympathetic and parasympathetic systems and the intrinsic heart contractility.

Spinal Cord Anatomy and Autonomic Nervous System

Explores spinal cord anatomy and the autonomic nervous system, including nerve pathways and vagus nerve functions.

Human Neuromodulation: Vagal Nerve Stimulation