The “crook of the neck” is a widely used, informal phrase that describes a specific curved or indented region of the upper back and neck. While not a formal anatomical term, it effectively communicates a recognizable area where the head and neck meet the shoulders.
Pinpointing the Location
The “crook of the neck” precisely denotes the hollow or indentation found at the base of the skull, where the neck begins its forward curve. This area involves the transition point between the skull’s occipital bone and the uppermost cervical vertebrae, particularly the first (atlas) and second (axis) vertebrae of the spine, which support the head and allow for rotation. Muscles, such as the suboccipital muscles located just beneath the occipital bone, and the upper fibers of the trapezius muscle, which extend from the base of the skull to the shoulder blade, contribute significantly to the shape and contours of this region. The indentation becomes more noticeable when the head is in a neutral, relaxed position or slightly tilted forward.
This area is a complex network of tissues, including joints, ligaments, tendons, and nerves, enabling a wide range of head movements. The soft tissues and the natural curvature formed by the cervical spine and surrounding musculature create the characteristic “crook.”
Common References and Related Anatomy
The term “crook” generally refers to a bend or curve, a meaning evident in phrases like the “crook of the arm” (inner elbow) or the “crook of the knee” (back of the knee). In the context of the neck, it highlights the natural curvature at the junction of the head and torso.
The “crook of the neck” is commonly referenced in non-medical situations to describe a position of comfort or closeness. Individuals often rest their head in the “crook of someone’s neck” for comfort or affection. It is also the natural spot where a small child might be nestled when carried. The phrase also applies to the common action of holding a phone between the ear and shoulder, using this natural curve to cradle the device. This area’s anatomical design facilitates head movement and provides a natural resting place due to its supportive yet flexible structure.