The hyoid bone and muscles Flashcards
Parts of the hyoid bone
- Greater horn
- Lesser horn
- Body
Which muscles does the hyoid bone attach to?
The supra hyoid
The infra hyoid
The muscles of the tongue: genioglossus and hyoglossus
The muscles of the pharynx: the middle constrictor
What are the functions of the supra hyoid muscles
- Elevate the hyoid bone
- Depress the mandible
which are the suprahyoid muscles?
- Myohyoid
- Digastric
- Geniohyoid
- Stylohyoid
Myohoid: points of attachment and innervation
Hyoid bone to mandible
Nerve supply is via V3
Geniohyoid: point of attachment and innervation
From the mandible to the hyoid in the middle (tongue)
Innervation via C1
Digastric: point of attachment and innervation
From mandible to hyoid to mastoid
Innervation of anterior belly: Via mandibular branch of trigeminal
Innervation of posterior belly: via facial nerve
Stylohyoid: point of attachment and innervation
From styloid process to the hyoid bone
Innervated via the facial nerve
Which are the infra hyoid muscles
Sternohyoid
Sternothyroid
Thyrohyoid
Omohyoid
What is the function of the infra hyoid muscles
depress the hyoid bone
Omohyoid: points of attachment and innervation
Hyoid to scapula
Innervation via C1-C3
Superficial
Sternohyoid: points of attachment and innervation
Manubrium of sternum to hyoid bone
Superficial
Innervation C1-C3
Sternothyroid: points of attachment and innervation
Sternum to thyroid
Nerve supply C1-C3
Deep
Thyrohyoid: points of attachment and innervation
Thyroid to hyoid bone
Innervation via C1
Deep
which are the superficial and which are the deep infra hyoid muscles?
Superficial: omohyoid, sternohyoid
Deep: sternothyroid, thyroihyoid
