What spinal cord region is associated with the cervical enlargement?

The cervical enlargement is a specific area of the spinal cord that is responsible for supplying nerves to the upper limbs. It is located between the C4 and T1 vertebrae. This region has a greater number of neurons and larger diameter in comparison to the surrounding areas of the spinal cord, reflecting the increased demand for motor and sensory innervation of the arms and hands.

The cervical enlargement accommodates the nerve roots that form the brachial plexus, which is essential for upper limb function. This area is crucial for coordinating movements and sensory feedback in the arms. Understanding the location of the cervical enlargement is important for interpreting clinical neurological assessments and diagnosing potential spinal cord injuries that may affect upper limb functionality.

Recognizing the boundaries of this region—specifically, from C4 to T1—clarifies the anatomical layout of the spinal cord and its correlation to nearby structures and nerves. This makes the choice representative of the correct anatomical location for the cervical enlargement.