thoraco-abdominal nerves
Information about thoraco-abdominal nerves
| Nerve: | ||
|---|---|---|
| Diagram of the course and branches of a typical intercostal nerve. | ||
| Intercostal nerves, the superficial muscles having been removed. | ||
| subject #211 945 | ||
| Innervates | Rectus abdominis muscle | |
They have the same arrangement as the upper ones as far as the anterior ends of the intercostal spaces, where they pass behind the costal cartilages, and between the Obliquus internus and Transversus abdominis, to the sheath of the Rectus abdominis, which they perforate.
They supply the Rectus abdominis and end as the anterior cutaneous branches of the abdomen; they supply the skin of the front of the abdomen.
The lower intercostal nerves supply the Intercostales and abdominal muscles; the last three send branches to the Serratus posterior inferior. About the middle of their course they give off lateral cutaneous branches.
These pierce the Intercostales externi and the Obliquus externus abdominis, in the same line as the lateral cutaneous branches of the upper thoracic nerves, and divide into anterior and posterior branches, which are distributed to the skin of the abdomen and back; the anterior branches supply the digitations of the Obliquus externus abdominis, and extend downward and forward nearly as far as the margin of the Rectus abdominis; the posterior branches pass backward to supply the skin over the Latissimus dorsi.
External links
- SUNY Labs 35:04-0100 - "Anterior Abdominal Wall: Thoracoabdominal Nerves"
- SUNY Anatomy Image 7103
- SUNY Anatomy Image 7218
- SUNY Anatomy Image 7558
- anterior cutaneous branch
- SUNY Anatomy Image 7267
- SUNY Anatomy Image 7502
- lateral cutaneous branch
- SUNY Anatomy Image 7044
- SUNY Anatomy Image 7419
Nerves: spinal nerves | |
|---|---|
| Cervical | anterior (Cervical plexus, Brachial plexus) - posterior (Posterior branches of cervical nerves, Suboccipital, Greater occipital, Third occipital) |
| Thoracic | anterior (Intercostal, Intercostobrachial - T2, Thoraco-abdominal nerves - T7-T11, Subcostal - T12) - posterior (Posterior branches of thoracic nerves) |
| Lumbar | anterior (Lumbar plexus, Lumbosacral trunk) - posterior (Posterior branches of the lumbar nerves, Superior cluneal nerves) |
| Sacral | anterior (Sacral plexus) - posterior (Posterior branches of sacral nerves, Medial cluneal nerves) |
| Coccygeal | anterior (Coccygeal plexus) - posterior (Posterior branch of coccygeal nerve) |
The rectus abdominis muscle (commonly known as "abs") is a paired muscle running vertically on each side of the anterior wall of the human abdomen (and in some other animals).
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The intercostal nerves are the anterior divisions (rami anteriores; ventral divisions) of the thoracic spinal nerves from T1 to T11.
Each nerve is connected with the adjoining ganglion of the sympathetic trunk by a gray and a white ramus communicans.
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Each nerve is connected with the adjoining ganglion of the sympathetic trunk by a gray and a white ramus communicans.
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The internal oblique muscle (of the abdomen) is the intermediate muscle of the abdomen, lying just underneath the external oblique and just above (superficial to) the transverse abdominal muscle.
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The transversus abdominis muscle, also known as the transversalis muscle and transverse abdominal muscle, is a muscle layer of the anterior and lateral abdominal wall which is just deep to (layered below) the internal oblique muscle.
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The rectus abdominis muscle (commonly known as "abs") is a paired muscle running vertically on each side of the anterior wall of the human abdomen (and in some other animals).
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Intercostal muscles are several groups of muscles that run between the ribs, and help form and move the chest wall.
There are three principal layers;
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There are three principal layers;
- the external intercostal muscles, which aid in quiet and forced inhalation.
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The Serratus posterior inferior muscle is a muscle of the human body. The muscle lies at the junction of the thoracic and lumbar regions. It arises from the vertebrae T11 through L3 and runs superolaterally to attach to the lower border of the 9th through 12th ribs.
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The Intercostales externi (External intercostals) are eleven in number on either side.
They extend from the tubercles of the ribs behind, to the cartilages of the ribs in front, where they end in thin membranes, the anterior intercostal membranes, which are continued
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They extend from the tubercles of the ribs behind, to the cartilages of the ribs in front, where they end in thin membranes, the anterior intercostal membranes, which are continued
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The external oblique muscle (of the abdomen) (also external abdominal oblique muscle) is the largest and the most superficial (outermost) of the three flat muscles of the lateral anterior abdomen.
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The latissimus dorsi (plural: latissimi dorsi) is the large, flat, dorso-lateral muscle on the trunk, posterior to the arm, and partly covered by the spinotrapezius on its median dorsal region.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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State University of New York, abbreviated SUNY (IPA pronunciation: ['suniː]) is a system of public institutions of higher education in New York, United States.
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A nerve is an enclosed, cable-like bundle of axons (the long, slender projection of a neuron). Neurons are sometimes called nerve cells, though this term is technically imprecise since many neurons do not form nerves, and nerves also include the glial cells that
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The term spinal nerve generally refers to the mixed spinal nerve, which is formed from the dorsal and ventral roots that come out of the spinal cord. The spinal nerve is the bit that passes out of the vertebrae through the intervertebral foramen.
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The cervical nerves are the spinal nerves from the cervical vertebrae.
Although there are seven cervical vertebrae (C1-C7), there are eight cervical nerves (C1-C8).
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Although there are seven cervical vertebrae (C1-C7), there are eight cervical nerves (C1-C8).
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The ventral ramus (anterior ramus, anterior branch, anterior divisions of the spinal nerves) supply the antero-lateral parts of the trunk, and the limbs; they are for the most part larger than the posterior divisions.
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The cervical plexus is a plexus of the ventral rami of the first four cervical spinal nerves which are located from C1 to C4 cervical segment in the neck. They are located laterally to the transverse processes between prevertebral muscles from the medial side and vertebral (m.
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The brachial plexus is an arrangement of nerve fibres, running from the spine, specifically from above the fifth cervical vertebra to underneath the first thoracic vertebra (C5-T1). It proceeds through the neck, the axilla (armpit region) and into the arm.
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The posterior (or dorsal) branches (or divisions) of the spinal nerves are as a rule smaller than the anterior divisions.
They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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They are directed backward, and, with the exceptions of those of the first cervical, the fourth and fifth sacral, and the coccygeal, divide into medial
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The posterior branches of cervical nerves branch from the dorsal rami of the cervical nerves.
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Branches
First
The posterior division of the first cervical or suboccipital nerve is larger than the anterior division, and emerges above the posterior arch of the atlas..... Click the link for more information.
The first spinal nerve, the suboccipital nerve exits the spinal cord between the skull and the first cervical vertebra, the atlas.
It supplies muscles around the suboccipital triangle including the rectus capitis posterior major, obliquus capitis superior, and obliquus
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It supplies muscles around the suboccipital triangle including the rectus capitis posterior major, obliquus capitis superior, and obliquus
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The greater occipital nerve is a spinal nerve arising from the dorsal primary rami of cervical spinal nerve 2, between the first and second cervical vertebrae, along with the lesser occipital nerve.
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third occipital nerve, which pierces the Trapezius and ends in the skin of the lower part of the back of the head.
It lies medial to the greater occipital and communicates with it.
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It lies medial to the greater occipital and communicates with it.
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