Also known as the ligamentum nuchae.
nuchae = "nape" (back of the neck).
The nuchal ligament - a sheet of connective tissue, midline in the back of the neck attaching to the skull and cervical vertebrae.
The nuchal ligament attaches to the midline bump on the back of the skull (external occipital protuberance) and the medial nuchal line (a.k.a the external occipital crest) of the skull.
Attaches to the spinous processes of the cervical vertebrae.
At the base of the neck (7th (last) cervical vertebra) the nuchal ligament continues as the cord-like supraspinous ligament.
The nuchal ligament is fibro-elastic, consisting of tough collagen fibres with elastic fibres too.
You should be able to easily feel the nuchal ligament in your neck (I could not!). Extend your head backward and press your fingers on the midline of the back of your neck. Then tilt your head forward and should be able to feel the nuchal ligament 'popping out' as it tightens to limit the forward bending of your head and neck.
A septum - "dividing wall" - situated between the trapezius muscles.
Continuous with the nuchal ligament , the supraspinous ligament is a strong, fibrous cord that attaches to the spinal column from the base of the neck to the lower back.
The supraspinous ligament attaches to the spinous processes of the seventh cervical vertebra, the twelve thoracic vertebrae and the upper lumbar vertebrae, usually terminating at L3, L4 or L5.
The collagen fibres of the supraspinous ligament are arranged in bundles and layers. The deepest fibres connect to the spinous processes of adjacent vertebrae, the middle fibres run between 2-3 vertebrae and the most superficial fibres span 3-4 vertebrae.
At the points of attachment to the tips of the spinous processes fibrocartilage is developed in the ligament. Intimately blended with the interspinal ligaments and neighbouring fascia.
The left and right trapezius muscles emerge from the nuchal ligament and the thoracic portion of the supraspinous ligament. Focusing on the trapezius muscles allows us to feel the relative positioning of these ligaments.
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