Corpus: Deep ansa cervicalis: Unterschied zwischen den Versionen
K (Schützte „Corpus:Deep ansa cervicalis“ ([Bearbeiten=Nur Administratoren erlauben] (unbeschränkt) [Verschieben=Nur Administratoren erlauben] (unbeschränkt))) |
Keine Bearbeitungszusammenfassung |
||
| Zeile 2: | Zeile 2: | ||
==Definition== | ==Definition== | ||
The '''deep ansa cervicalis''' is a nerve loop formed by the superior root (radix superior) of segments C1 and C2 and the inferior root (radix inferior) of segments C2 and C3 of the cervical plexus. | The '''deep ansa cervicalis''' is a nerve loop formed by the superior root (radix superior) of segments C1 and C2 and the inferior root (radix inferior) of segments C2 and C3 of the [[Corpus:cervical plexus|cerviacal plexus]]. | ||
<dcembed ratio="16x9" caption="3D model of the head nerves. Ansa cervicalis is marked with number 18."><dcEmbedUrl src="https://sketchfab.com/3d-models/model-leitungsbahnen-nerven-135d4b10cc2346888a0ef55c28b92054?annotation=18"></dcEmbedUrl></dcembed> | <dcembed ratio="16x9" caption="3D model of the head nerves. Ansa cervicalis is marked with number 18."><dcEmbedUrl src="https://sketchfab.com/3d-models/model-leitungsbahnen-nerven-135d4b10cc2346888a0ef55c28b92054?annotation=18"></dcEmbedUrl></dcembed> | ||
==Function== | ==Function== | ||
| Zeile 12: | Zeile 12: | ||
* [[Corpus:Omohyoid muscle|omohyoid muscle]] | * [[Corpus:Omohyoid muscle|omohyoid muscle]] | ||
Some fibers of the superior root reach the | Some fibers of the superior root reach the thyrohyoid muscle via the [[Corpus:Hypoglossal nerve|hypoglossal nerve]] as the thyrohyoid ramus. | ||
The only suprahyoid muscle supplied by the deep ansa cervicalis is the [[Corpus:Geniohyoid muscle|geniohyoid muscle]], which receives its innervation from the superior root. | The only suprahyoid muscle supplied by the deep ansa cervicalis is the [[Corpus:Geniohyoid muscle|geniohyoid muscle]], which receives its innervation from the superior root. | ||
==Topography== | ==Topography== | ||
The deep ansa cervicalis is located beneath the sternocleidomastoid muscle and crosses the internal jugular vein and the anterior scalene muscle during its course. | The deep ansa cervicalis is located beneath the sternocleidomastoid muscle and crosses the [[Corpus:internal jugular vein|internal jugular vein]] and the [[Corpus:anterior scalene muscle|anterior scalene muscle]] during its course. | ||
In the carotid triangle (trigonum caroticum), fibers of the superior root run a short distance with the hypoglossal nerve as the descendent branch of the hypoglossal nerve but do not exchange fibers with it ("ansa hypoglossi"). | In the carotid triangle (trigonum caroticum), fibers of the superior root run a short distance with the [[Corpus:hypoglossal nerve|hypoglossal nerve]] as the descendent branch of the hypoglossal nerve but do not exchange fibers with it ("ansa hypoglossi"). | ||
The fibers of the inferior root run medially along the side of the phrenic nerve as the descending cervical nerve. The superior and inferior roots converge below the intermediate tendon of the omohyoid muscle to form the deep ansa cervicalis. | The fibers of the inferior root run medially along the side of the phrenic nerve as the descending cervical nerve. The superior and inferior roots converge below the intermediate tendon of the omohyoid muscle to form the deep ansa cervicalis. | ||
Version vom 21. Juni 2024, 06:48 Uhr
Synonyms: deep cervical nerve loop, ansa cervicalis, ansa hypoglossi
Definition
The deep ansa cervicalis is a nerve loop formed by the superior root (radix superior) of segments C1 and C2 and the inferior root (radix inferior) of segments C2 and C3 of the cerviacal plexus.
Function
The deep ansa cervicalis innervates the entire infrahyoid musculature through its nerve branches, which include:
Some fibers of the superior root reach the thyrohyoid muscle via the hypoglossal nerve as the thyrohyoid ramus.
The only suprahyoid muscle supplied by the deep ansa cervicalis is the geniohyoid muscle, which receives its innervation from the superior root.
Topography
The deep ansa cervicalis is located beneath the sternocleidomastoid muscle and crosses the internal jugular vein and the anterior scalene muscle during its course.
In the carotid triangle (trigonum caroticum), fibers of the superior root run a short distance with the hypoglossal nerve as the descendent branch of the hypoglossal nerve but do not exchange fibers with it ("ansa hypoglossi").
The fibers of the inferior root run medially along the side of the phrenic nerve as the descending cervical nerve. The superior and inferior roots converge below the intermediate tendon of the omohyoid muscle to form the deep ansa cervicalis.
The superficial ansa cervicalis lies on the sternocleidomastoid muscle and beneath the platysma.