The latissimus dorsi (lats) are controlled by the thoracodorsal nerve.
Understanding the Thoracodorsal Nerve
The thoracodorsal nerve is crucial for the function of the latissimus dorsi, a large muscle in the back responsible for various arm movements. Here's a detailed look:
- Origin: The thoracodorsal nerve originates from the posterior cord of the brachial plexus.
- Spinal Nerve Roots: It receives fibers from the C6 to C8 spinal nerve roots, with a primary contribution from C7.
- Course: The nerve travels alongside the thoracodorsal artery and its associated veins in a neurovascular bundle.
Role of the Thoracodorsal Nerve
The thoracodorsal nerve's primary function is to innervate the latissimus dorsi muscle, enabling it to perform the following actions:
- Adduction: Bringing the arm towards the midline of the body.
- Extension: Moving the arm backward.
- Internal Rotation: Rotating the arm inward.
Clinical Significance
Damage to the thoracodorsal nerve can impair the function of the latissimus dorsi.
