Intertransversarii Anteriores Cervicis 1–7
Back · Trunk
The intertransversarii anteriores cervicis are small muscular slips that connect the anterior tubercles of adjacent cervical transverse processes. Each runs from the anterior tubercle of the transverse process of one cervical vertebra to the anterior tubercle of the transverse process of the vertebra above, so they lie in front of the corresponding posterior intertransverse muscles. Because they are placed lateral to the vertebral bodies, their contraction produces lateral flexion of the cervical spine to the same side and, acting together across levels, they steady adjacent vertebrae during neck movement. Reflecting their ventral position, they are supplied by the anterior (ventral) rami of the cervical spinal nerves rather than the dorsal rami that serve the deep back muscles.
Origin, Insertion, Action & Nerve
Origin
Anterior tubercle of the transverse process of a cervical vertebra
Insertion
Anterior tubercle of the transverse process of the adjacent vertebra above
Action
Laterally flexes the cervical spine and stabilizes adjacent vertebrae
Nerve
Anterior (ventral) rami of cervical spinal nerves
Attachments explained
The Intertransversarii Anteriores Cervicis 1–7 is defined first by where it attaches. Its origin is the more fixed anchor, usually the proximal or more stable end that stays put during contraction, while its insertion is the more mobile point that is pulled toward the origin when the muscle shortens.
Origin
Anterior tubercle of the transverse process of a cervical vertebra
Insertion
Anterior tubercle of the transverse process of the adjacent vertebra above
Action & function
When the Intertransversarii Anteriores Cervicis 1–7 contracts, it produces the following movement: Laterally flexes the cervical spine and stabilizes adjacent vertebrae.
As part of the Back group of the Trunk, it works alongside neighbouring muscles to generate smooth, coordinated movement and to stabilise the structures it acts on.
Nerve supply & clinical relevance
The Intertransversarii Anteriores Cervicis 1–7 receives its nerve supply from the Anterior (ventral) rami of cervical spinal nerves.
Because a muscle can only contract when its nerve is intact, injury to the Anterior can weaken or paralyse the Intertransversarii Anteriores Cervicis 1–7, impairing the movements it normally produces (laterally flexes the cervical spine and stabilizes adjacent vertebrae). This is why knowing the innervation is central to localising nerve lesions in clinical practice.
How to study the Intertransversarii Anteriores Cervicis 1–7 (the OIANS method)
Distinguish the three cervical intertransverse muscles by their position relative to the transverse process. This anterior set connects the anterior tubercles, so picture it lying on the front of the transverse processes, close to the vertebral bodies and the cervical nerve as it exits. From that ventral location the lateral flexion action and the ventral ramus supply both follow logically.
Use the innervation as a discriminating fact on exams: the anterior and the posterior lateral cervical intertransversarii are served by anterior (ventral) rami because they lie ventral to the plane of the dorsal rami, whereas the posterior medial set is served by dorsal rami. Learning this trio together, side by side, prevents the common error of assigning them all to one ramus.
Frequently asked questions
Where is the Intertransversarii Anteriores Cervicis 1–7 located?
The Intertransversarii Anteriores Cervicis 1–7 is a muscle of the Back group, located in the Trunk.
What is the origin of the Intertransversarii Anteriores Cervicis 1–7?
Anterior tubercle of the transverse process of a cervical vertebra
What is the insertion of the Intertransversarii Anteriores Cervicis 1–7?
Anterior tubercle of the transverse process of the adjacent vertebra above
What movements does the Intertransversarii Anteriores Cervicis 1–7 produce?
Laterally flexes the cervical spine and stabilizes adjacent vertebrae
What nerve supplies the Intertransversarii Anteriores Cervicis 1–7?
Anterior (ventral) rami of cervical spinal nerves
Is the Intertransversarii Anteriores Cervicis 1–7 free to study in OIANS?
The Intertransversarii Anteriores Cervicis 1–7 is always free to browse. Its full origin, insertion, action and nerve details are open to everyone in the Muscle Directory. Quiz and Flashcard practice for the Trunk is part of the one-time Lifetime upgrade, though; only the Upper Limb decks are free to test yourself on.
Related muscles
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