Diagram Highlights-

Infra hyoid muscles –

1. Thyrohyoid muscle – Present between thyroid cartilage and hyoid bone.

2. Sternothyroid muscle – Present between sternum and thyroid cartilage.

3. Sternohyoid muscle – Present between sternum and hyoid bone.

4. Omohyoid muscle – Present between scapula and hyoid bone.

It is divide into two parts-
A. Superior belly of omohyoid
B. Inferior belly of omohyoid

Nerve supply –

All Infra muscles are supplied by ansa cervicalis.