Which myotome is responsible for ankle dorsiflexion?

The myotome responsible for ankle dorsiflexion is L4. This is due to the fact that the muscles primarily involved in dorsiflexion, such as the tibialis anterior, are innervated by the L4 nerve root. The L4 myotome specifically facilitates the movement of lifting the foot upwards towards the shin, which is the definition of dorsiflexion.

Understanding the role of specific myotomes in motor function is crucial for assessing neurological integrity in clinical settings. While other myotomes may be involved in related movements or function, L4 is specifically linked to the action of dorsiflexing the ankle. This knowledge is significant in both diagnostic evaluations and rehabilitation practices within orthotics and prosthetics.