Thoraco-abdominal nerves: Difference between revisions
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The anterior divisions of the seventh, eighth, ninth, tenth, and eleventh thoracic [[intercostal nerves]] are continued anteriorly from the intercostal spaces into the abdominal wall; hence they are named '''thoraco-abdominal nerves''' (or '''thoracicoabdominal intercostal nerves'''). |
The anterior divisions of the seventh, eighth, ninth, tenth, and eleventh thoracic [[intercostal nerves]] are continued anteriorly from the intercostal spaces into the abdominal wall; hence they are named '''thoraco-abdominal nerves''' (or '''thoracicoabdominal intercostal nerves'''). |
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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 [[ |
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. |
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They supply the |
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. |
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The lower intercostal nerves supply the [[ |
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. |
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These pierce the [[ |
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]]. |
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==External links== |
==External links== |
Latest revision as of 17:45, 17 February 2024
Thoraco-abdominal nerves | |
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Innervates | Rectus abdominis muscle |
Anatomical terms of neuroanatomy |
The anterior divisions of the seventh, eighth, ninth, tenth, and eleventh thoracic intercostal nerves are continued anteriorly from the intercostal spaces into the abdominal wall; hence they are named thoraco-abdominal nerves (or thoracicoabdominal intercostal nerves).
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
[edit]- Anatomy photo:35:04-0100 at the SUNY Downstate Medical Center - "Anterior Abdominal Wall: Thoracoabdominal Nerves"
- Anatomy image:7103 at the SUNY Downstate Medical Center
- Anatomy image:7218 at the SUNY Downstate Medical Center
- Anatomy image:7558 at the SUNY Downstate Medical Center
- anterior cutaneous branch
- Anatomy image:7267 at the SUNY Downstate Medical Center
- Anatomy image:7502 at the SUNY Downstate Medical Center
- lateral cutaneous branch
- Anatomy image:7044 at the SUNY Downstate Medical Center
- Anatomy image:7419 at the SUNY Downstate Medical Center