Spinal trigeminal nucleus

The spinal trigeminal nucleus is part of the brainstem. This image shows its location in the human brain.

The Spinal Trigeminal Nucleus is a component of the brainstem that plays a crucial role in the sensory function of the face. It is part of the trigeminal nerve (cranial nerve V), which is responsible for sensations in the face and motor functions such as biting and chewing.

Structure

The spinal trigeminal nucleus extends from the mid-pons to the medulla oblongata's lower border, and it continues caudally as the spinal tract of the trigeminal nerve into the upper cervical spinal cord. It is divided into three parts: the pars oralis, pars interpolaris, and pars caudalis.

Function

The spinal trigeminal nucleus is involved in the transmission of tactile, nociceptive, and thermal sensations from the face. It receives information from the trigeminal nerve, as well as the facial, glossopharyngeal, and vagus nerves.

Clinical Significance

Damage to the spinal trigeminal nucleus can result in loss of pain and temperature sensation from the ipsilateral face. This can occur in conditions such as Wallenberg syndrome, a type of stroke that affects the brainstem.

See Also

• Trigeminal nerve
• Brainstem
• Wallenberg syndrome