A 19-year-old victim has been delivered to the casualty department with a cut wound of the trapezius muscle. Which of the cervical fasciae forms a sheath for this muscle?

Answer options

1. Investing layer of cervical fascia
2. Prevertebral layer of cervical fascia
3. Muscular part of the pretacheal layer of cervical fascia
4. Visceral part of the pretracheal layer of cervical fascia
5. Carotid sheath of cervical fascia

Explanation

The Investing layer of the deep cervical fascia is the most superficial part of the deep cervical fascia, and it encloses the whole neck. Where it meets the trapezius and sternocleidomastoid muscles.