An animal has an increased tonus of extensor muscles. This is the result of enhanced information transmission to the motoneurons of the spinal cord through the following descending pathways:

Answer options

1. Medial corticospinal
2. Reticulospinal
3. Rubrospinal
4. Lateral corticospinal
5. Vestibulospinal

Explanation

The vestibulospinal tract is responsible for upright posture and head stabilization by sending signals to the extensor muscles of the legs.