01/06/2026
Muscle Monday
This week's muscle is Longissimus dorsi.
This muscle has attachments to the cervical spine, from between the withers to the lower back. This then connects to fascia that continues on to the middle gluteal muscle. This is the biggest and longest muscle of the spine.
Action
The Longissimus dorsi lifts the head and neck. Lateral flexion of the trunk and neck. Extends the back and loins. It aids lateral flexion and is part of the group of muscles that aid propulsion.
Dysfunction
- Can cause stiff vertebrae
- Restricted lateral flexion of the body
- Stiff back