- May 6, 2026Semispinalis cervicis is the largest cervical extensor, spanning from the upper thoracic transverse processes to the mid-cervical spinous processes. It…
- May 6, 2026The anterior scalene is the key muscle in thoracic outlet syndrome — the subclavian artery and brachial plexus pass between…
- May 6, 2026The middle scalene is the largest scalene and forms the posterior wall of the interscalene triangle. The brachial plexus roots…
- May 6, 2026The posterior scalene inserts on the second rib (unlike the others which insert on the first rib) and is the…
- May 6, 2026Scalenus minimus is an accessory scalene muscle present in approximately 50% of individuals. It contributes to the suprapleural membrane tension…
- May 6, 2026The platysma is a broad subcutaneous sheet covering the anterior neck. Its SMAS connections to the facial musculature make it…
- May 6, 2026Obliquus capitis inferior is the largest suboccipital muscle and the primary rotator of C1 on C2. It is unique in…
- May 6, 2026Obliquus capitis superior connects C1 to the occiput, forming the superolateral boundary of the suboccipital triangle. It is one of…
- May 6, 2026Rectus capitis posterior major is the larger of the two rectus capitis posterior muscles, forming the superomedial wall of the…
- May 6, 2026Rectus capitis posterior minor is the smallest suboccipital muscle, connecting the C1 posterior arch to the occipital bone. Its myodural…