Nuchal lines

Nuchal lines

Nuchal lines refer to the bony ridges on the occipital bone at the back of the skull where muscles and ligaments attach, including the origin of the muscle that extends from the back of the skull to the thoracic vertebrae. The superior nuchal line specifically refers to the bony ridge where the connective tissue of the scalp attaches to the back of the skull.From: Biomechanics in Ergonomics [2019], The effect of the scalp on the effectiveness of bicycle helmets' anti-rotational acceleration technologies [2021]

Functional Anatomy and Biomechanics

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Published in Emeric Arus, Biomechanics of Human Motion, 2017

Emeric Arus

Musculus transversospinalis represents three different muscles, muscu- lus semispinalis, multifidi, and rotatores. Musculus semispinalis has three regions, thoracis, cervicis, and capitis. These three muscles have their origin on the thoracis region vertebrae. They are distally inserted between both nuchal lines of the cranium.

Effect of neck flexion angles on neck muscle activity among smartphone users with and without neck pain

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Published in Ergonomics, 2019

Suwalee Namwongsa, Rungthip Puntumetakul, Manida Swangnetr Neubert, Rose Boucaut

Participants were allocated into two groups differentiated only by the presence of pain: the control group without neck pain, and the case group with neck pain. For inclusion into the neck pain group, participants had to have experienced pain during smartphone usage for more than 3 months in the past year (Xie et al. 2016). There were three additional inclusion criteria: area of pain, mechanical nature of pain and intensity of cervical symptoms. Relevant symptom area included pain on posterior neck or shoulder, which is the area from the superior nuchal line to the spinous process of the 1st thoracic vertebra. Mechanical characteristics consisted of symptoms provoked by sustained neck posture, neck movement or palpation of cervical musculature (Martínez-Segura et al. 2006). Intensity of pain level required at rest was at least a mild level (3 score or greater) measured using a Visual Analogue Scale (Jensen, Chen, and Brugger 2003).

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Functional Anatomy and Biomechanics

Effect of neck flexion angles on neck muscle activity among smartphone users with and without neck pain