Related Experiment Video
Updated: Sep 25, 2025

Author Spotlight: Minimally Invasive Relief for Occipital Neuralgia at the Nuchal Line
Published on: September 13, 2024
Nummular and Side-locked Headaches for the Otolaryngologist
Sheng Zhou1, Ido Badash1, Joni K Doherty2
1LAC+USC Medical Center Otolaryngology Department, 1200 North State Street, Suite A2E, Los Angeles, CA 90033, USA.
Abstract:
Side-locked headaches are a common symptom having a wide-ranging differential. Unchanging in laterality, these headaches can represent neuralgias, trigeminal autonomic cephalgias, ophthalmologic disorders, otolaryngologic and craniofacial disorders, vascular disorders, and malignancy. In rarer situations, they have presented secondary to neurosurgical or dermatologic considerations. Loss of cranial nerves and visual changes warrant additional evaluation.
Related Concept Videos
Tonsillitis I: Introduction
Etiology
Three primary contributing factors have been identified.
Muscles that Move the Head
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...
Tonsillitis II: Management
Chronic Pharyngitis
Etiology
It often arises from persistent viral or bacterial infections affecting sinuses and tonsils.
Additional contributing factors include inadequate dental hygiene, mouth breathing, recurring tonsillitis, allergic rhinitis, laryngopharyngeal reflux, and exposure to smoke, chemicals, and other environmental pollutants. Allergic reactions to pollen, mold, and pet dander, chronic cough, excessive voice usage,...
Angle Closure Glaucoma: Treatment
Cranial Bones: Lateral View
The temporal bone forms the lower lateral side of the skull. The temporal bone is subdivided into several regions. The flattened upper portion is the squamous portion of the temporal bone. Below this area and projecting anteriorly is the zygomatic process of the temporal bone, which forms the posterior portion of the zygomatic arch. Posteriorly is the mastoid portion of the temporal bone. Projecting...

