Multifidus Cervicis

Back · Trunk

The Multifidus Cervicis is found among the Back muscles of the Trunk. It arises from Articular processes of the lower four cervical vertebrae (C4–C7) and attaches to Spinous processes of vertebrae two to four segments superior to the origin. It is responsible for several movements: Stabilizes the vertebrae; extends and rotates the cervical spine to the opposite side. Its nerve supply is the Posterior (dorsal) rami of cervical spinal nerves.

Origin, Insertion, Action & Nerve

Origin

Articular processes of the lower four cervical vertebrae (C4–C7)

Insertion

Spinous processes of vertebrae two to four segments superior to the origin

Action

Stabilizes the vertebrae; extends and rotates the cervical spine to the opposite side

Nerve

Posterior (dorsal) rami of cervical spinal nerves

Attachments explained

The Multifidus Cervicis 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

Articular processes of the lower four cervical vertebrae (C4–C7)

Insertion

Spinous processes of vertebrae two to four segments superior to the origin

Action & function

When the Multifidus Cervicis contracts, it produces the following movements: Stabilizes the vertebrae; extends and rotates the cervical spine to the opposite side.

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 Multifidus Cervicis receives its nerve supply from the Posterior (dorsal) rami of cervical spinal nerves.

Because a muscle can only contract when its nerve is intact, injury to the Posterior can weaken or paralyse the Multifidus Cervicis, impairing the movements it normally produces (stabilizes the vertebrae). This is why knowing the innervation is central to localising nerve lesions in clinical practice.

How to study the Multifidus Cervicis (the OIANS method)

OIANS stands for Origin, Insertion, Action and Nerve, the four facts that uniquely define every skeletal muscle. To learn the Multifidus Cervicis, work through them in order: picture its origin, trace the muscle to its insertion, reason out the action that shortening between those two points must create, then add the nerve that drives it.

Most students remember the Multifidus Cervicis fastest by linking its action back to its attachments rather than memorising each fact in isolation. Once the origin and insertion make sense, the action usually follows logically.