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Lecture

Sympathetic Nervous System: Anatomy and 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 anatomy and innervation of the sympathetic nervous system, focusing on the sympathetic trunks, ganglia, and their connections with various organs such as the heart and lungs. It explains the role of sympathetic and parasympathetic fibers in regulating heart rate, contraction force, and coronary artery constriction, as well as their pathways through the spinal cord and ganglia.

Instructor

Romain Zufferey

Official source

Ontological neighbourhood

Biology

Anatomy: Neuroanatomy

Health sciences

Cardiology: Cardiovascular disease

Related concepts (32)

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.

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.

Nerve

A nerve is an enclosed, cable-like bundle of nerve fibers (called axons) in the peripheral nervous system. Axons transmit electrical impulses. Nerves have historically been considered the basic units of the peripheral nervous system. A nerve provides a common pathway for the electrochemical nerve impulses called action potentials that are transmitted along each of the axons to peripheral organs or, in the case of sensory nerves, from the periphery back to the central nervous system.

Related lectures (31)

Spinal Cord Anatomy and Autonomic Nervous System

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

Brain Anatomy

Covers the divisions of the nervous system, brain structure, cranial nerves, and brain conditions.

Innervation of Heart: Anatomy and Mechanisms

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

Cranial Nerves and Muscles of the Head: Anatomy Overview

Provides an overview of the cranial nerves and head muscles anatomy, including sensory territories and nervous system exploration.

Cardiovascular Regulation: Sympathetic and Parasympathetic Systems