Greater occipital

Greater occipital nerve
Posterior primary divisions of the upper three cervical nerves. (Great occipital nerve labeled at center top.)
Details
From	C2
Innervates	semispinalis capitis, scalp
Identifiers
Latin	Nervus occipitalis major
Dorlands /Elsevier	n_05/12566321
TA	A14.2.02.008
FMA	65443
Anatomical terms of neuroanatomy []

The greater occipital nerve is a spinal nerve, specifically the medial branch of the dorsal primary ramus of cervical spinal nerve 2. This nerve arises from between the first and second cervical vertebrae, along with the lesser occipital nerve. It ascends after emerging from below the suboccipital triangle beneath the obliquus capitis inferior muscle. It then passes through the trapezius muscle and ascends to innervate the skin along the posterior part of the scalp to the vertex. It innervates the scalp at the top of the head, over the ear and over the parotid glands.

Disorder of this nerve is one of the causes of cervicogenic headaches, referred to as occipital neuralgias. A common site, and usually misdiagnosed area of entrapment for the greater occipital nerve is at the obliquus capitis inferior muscle.

Most people with tension headaches experience increasing intensity with time, and report pain originating in the back of the head (occipital) moving to the front of the head (supraorbital). Neurostimulation is sometimes used to treat tension headaches that originate from the occipital nerve.

Dermatome distribution of the trigeminal nerve

The nerves of the scalp, face, and side of neck.

Lateral head anatomy detail