Question

muscle responsible for extension of the neck
longus colli
splenius capitis and cervicis
sternocliedomastoid
scalenes

Explanation:

• Longus Colli: Flexes the neck.
• Splenius capitis and cervicis: Extends the neck.
• Sternocleidomastoid: Rotates and flexes the neck.
• Scalenes: Elevates the first two ribs and flexes the neck.

Answer:

Splenius capitis and cervicis