What is a ganglion and what does a ganglion do

The nervous system includes the central part (brain and spinal cord) and the peripheral part (cranial nerves and spinal nerves), and the ganglia are the parts of the nervous system that are surrounded by neuronal cell bodies, such as the spinal ganglia, which mainly conduct excitation.

Ganglia refers to clumps of neuronal cell bodies present in certain parts of the peripheral nervous system.

Ganglia are nodular structures made up of neurons with the same function that gather in the peripheral part outside the central nervous system. The surface is covered with a connective tissue membrane that contains blood vessels, nerves, and fat cells. The hair follicle is connected to the peripheral epineurium and perineurium and penetrates deep into the ganglia, forming a reticulated scaffold within the ganglia.

The fibers of nerve cells in the ganglia are distributed to the relevant parts of the body and are called postganglionic fibers. Depending on physiology and morphology, ganglia can be divided into spinal ganglia and autonomic ganglia. The cerebrospinal fluid ganglia are functionally sensory neurons and morphologically pseudounipolar or bipolar neurons.

Autonomic ganglia include sympathetic ganglia and parasympathetic ganglia. The sympathetic ganglia are located on both sides of the spine. The parasympathetic ganglia are located near or within the walls of innervated organs.

In the ganglia, the axons of preganglionic and postganglionic neurons form synapses. Ganglia are connected to the brain and spinal cord by nerve fibers. Ganglia can be divided into cerebrospinal fluid ganglia and autonomic ganglia.

The cerebrospinal fluid ganglia are located on the posterior roots of the spinal nerves and part of the cranial nerve trunk, and the autonomic ganglia include the sympathetic ganglia and the parasympathetic ganglia. The sympathetic ganglia are located on both sides and in front of the spine, while the parasympathetic ganglia are located near or inside the organs. The ganglia are generally oval in shape, connected to peripheral nerves, and surrounded by connective tissue sacs.

The nerve cells in the ganglia are called ganglion cells, and the cell body is surrounded by a layer of flattened satellite cells with a basal membrane outside the satellite cells. In addition to ganglion cells, ganglia contain a large number of nerve fibers and a small amount of connective tissue and blood vessels. In addition, the cell body of the afferent nerve, with axons and dendrites, the dendrites connect the nerve endings of the receptors, and the axons act as afferent nerve centers, also known as ganglia.

1. Nerve nucleus: In the central nervous system, the gray matter mass formed by the cell bodies of neurons and their dendrites with similar morphology and function is called the nucleus.

2. Ganglia: a nodular structure formed by the collection of nerve cells. Ganglia are divided into three types, namely chain segments, collateral segments, and terminal segments.

The links are divided on both sides of the spine, and the sympathetic nerve chain is connected by nerve bundles between the nodes; Lateral ganglia are listed in front of the spine and around the aorta, such as celiac ganglia, mesenteric ganglia, etc.; The terminal segment is located near or in the wall of the organ it innervates. The ganglion surface is covered with connective tissue and can be divided into preganglionic and postganglionic fibers. The axons of the lower central nervous cells of the preganglionic fiber system protrude from the central nervous system and terminate in the ganglion by the cerebrospinal nerves.

Cell axons that occur in the postganglionic fibrous ganglia terminate in internal organs.

Neuronucleus: In the central nervous system, neuronal cell bodies that are morphologically and functionally similar are often clustered together and are called nuclei.

Ganglia, where neuronal cell bodies are located.

Nuclei and ganglia: Neuronal cell bodies that are similar in morphology and function come together and are called nuclei in the central nervous system and ganglia in the peripheral nervous system.

Nuclei and ganglia: Neuronal cell bodies that are morphologically and functionally similar come together and are called neurons in the central nervous system and ganglia in the peripheral nervous system.

Outside the central cortex, morphologically and functionally similar neuronal cell bodies aggregate into clumps or columns, called nuclei, and in the peripheral part, neuronal cell bodies aggregate called ganglia.

The nucleus is the nucleus in the cell body, and the ganglion refers to a node where the efferent nerve is.

Nerve nucleus: In the brain and spinal cord, in other parts except the cortex, the cell bodies of neurons with similar structure and function are concentrated into a mass of gray matter and their dendrites.

Ganglia: In the peripheral nervous system, the site of the cell body of neurons that is structurally similar and functionally identical.

Ganglia are nodular structures formed by a collection of nerve cells.

Ganglia are divided into three types, namely chain segments, collateral segments, and terminal segments.

1. The links are arranged on both sides of the spine, and the intersections are connected by nerve bundles to form an intersecting dry nerve chain.

2. Lateral ganglia are listed in front of the spine and around the aorta, such as celiac ganglia, mesenteric ganglia, etc.;

3. The terminal segment is located near or in the wall of the organ it innervates or in the organ wall.

Ganglion is anatomically a cluster of biological tissues, usually a collection of nerve cell bodies. The cells within the ganglia are called ganglion cells, although the term is sometimes used specifically to refer to retinal ganglion cells.

Nucleus: A mass of gray matter formed by the clump of gray matter formed by the clump of morphologically and functionally similar neuronal cell bodies and their dendrites within the central nervous system.

Ganglion: Anatomically a cluster of biological tissues, usually a collection of nerve cell bodies.

According to the different physiology and morphology, ganglia can be spinal ganglia and autonomic ganglia, cerebrospinal ganglia are sensory neurons in function, pseudomonopolar or bipolar neurons in morphology, and autonomic ganglia include sympathetic and parasympathetic ganglia. Pat Clan.

The sympathetic ganglion is located on both sides of the spine, and the parasympathetic ganglion is located near the innervated organ or in the organ wall, in the ganglia, the axons of the preganglionic neurons and the postganglionic neurons form synapses, and the ganglia are connected to the brain and spinal cord through nerve fibers.

Ganglia are nodular structures formed by the collection of functionally identical neurons in peripheral parts other than the center. The surface is covered with a connective tissue membrane containing blood vessels, nerves, and fat cells. The afferent nerve in the diagram is circled by the ganglia.

3 all.

First, the distribution location is different.

1. Nerve knot: In the peripheral nerve center, neurons (i.e., nerve cells) are densely concentrated.

2. Ganglia: The links are arranged on both sides of the spine, and the sympathetic nerve chain is connected by nerve bundles between the nodes; Lateral ganglia are listed in front of the spine and around the aorta, such as celiac ganglia, mesenteric ganglia, etc.; The terminal segment is located near or in the wall of the organ it innervates.

Second, the classification is different.

1. Nerve knots: Only agree to call nerve knots.

2. Ganglia: divided into cerebrospinal ganglia and autonomic ganglia.

Third, the structure shape is different.

1. Nerve knots: Neurons (i.e., nerve cells) are densely concentrated to form a collective.

2. Ganglia: a nodular structure formed by the collection of nerve cells.

Nerve nodes: In the peripheral nerve center, the place where neurons (i.e., nerve cells) are densely concentrated is called a nerve node.

Ganglia: A nodular structure formed by the collection of functionally identical neuronal cell bodies in peripheral parts other than the center.

The aggregation of inclusions of a large number of ganglia is called a nerve node.