Splenius muscle

Splenius Muscles

File:Splenius muscles.png

Splenius muscles

The Splenius muscles are a group of muscles located in the back of the neck. They are part of the superficial layer of the deep cervical muscles, and include the Splenius Capitis and Splenius Cervicis muscles.

Structure

The Splenius muscles are broad and thin, and are situated on the back and side of the neck. They are covered by the trapezius muscle.

Splenius Capitis

The Splenius Capitis is a broad, straplike muscle located in the back of the neck. It originates from the ligamentum nuchae and the spinous processes of the seventh cervical and the first three thoracic vertebrae. It inserts into the mastoid process of the temporal bone and the lateral third of the superior nuchal line.

Splenius Cervicis

The Splenius Cervicis is smaller and narrower than the Splenius Capitis. It originates from the spinous processes of the third to the sixth thoracic vertebrae, and inserts into the transverse processes of the first to the third cervical vertebrae.

Function

The Splenius muscles are responsible for head rotation, head flexion, and lateral flexion of the neck. They also help to maintain posture and keep the head upright.

Clinical significance

Damage or strain to the Splenius muscles can result in neck pain, headache, and restriction in neck movement. Treatment usually involves physical therapy, pain management, and in severe cases, surgery.

See also

• List of muscles of the human body
• Neck anatomy
• Muscular system