GROSS ANATOMY

Detailed explanation-1: -Longissimus capitis finally inserts at the lateral surface of the mastoid process of the temporal bone, adjacent to the attachments of the sternocleidomastoid and splenius capitis muscles.

Detailed explanation-2: -The longissimus cervicis originates from the transverse processes of T1-T5 and inserts onto the transverse processes of C2-C6. The longissimus functions to produce neck extension, lateral neck flexion, back extension, and lateral back flexion.

Detailed explanation-3: -Longissimus capitis It arises by tendons from the transverse processes of the upper four or five thoracic vertebrae, and the articular processes of the lower three or four cervical vertebrae, and is inserted into the posterior margin of the mastoid process, beneath the splenius capitis and sternocleidomastoid.

Detailed explanation-4: -Attachments of Longissimus Thoracis: Origin & Insertion Origin: Transverse and spinous processes of lumbar vertebrae; sacrum and iliac crest via iliocostalis lumborum tendon & lumbosacral aponeurosis. Insertion: Transverse processes of T1 – T12; between tubercles and angles of lower 9 to 10 ribs.

Detailed explanation-5: -Longissimus thoracis shares a broad thick tendon with iliocostalis lumborum, and fiber attachments to the transverse and accessory processes of the lumbar vertebrae and thoracolumbar fascia, which then attaches to the tips of the transverse processes and between the tubercles and angles of the lower 9–10 ribs.