Anterior neck (Thyroid and Strap Muscles) Flashcards
1
Q
Hyoid bone: structure and function
A
- Greater and lesser horn and body
- Anchoring structure for the tongue
2
Q
Suprahyoid muscles and function
A
- Forms the floor of the mouth
- Important role in mastication, swallowing and speech
- Positioning of hyoid bone
- Mylohyoid
- Geniohyoid
- Digastric
- Stylohyoid
3
Q
Mylohyoid attachment and innervation
A
- Mandible and hyoid bone
- Pharyngeal muscle
- V3
4
Q
Geniohyoid attachment and innervation
A
- Inferior mental spine of mandible and hyoid bone
- C1 via CNXII
5
Q
Digastric attachment and innervation
A
- Mastoid, hyoid and mandible
- Pharyngeal muscle
- Anterior: CN V
- Posterior: CN VII
6
Q
Stylohyoid attachment and innervation
A
- Styloid process and hyoid bone
- Pharyngeal muscle
- CN VII
7
Q
Infrahyoid muscles and function
A
- Depress hyoid bone and larynx during speech and swallowing
- Sternohyoid
- Sternothyroid
- Thyrohyoid
- Omohyoid
8
Q
Sternohyoid attachment and innervation
A
- Manubrium and hyoid
- C1-3 (ansa cervicalis)
9
Q
Sternothyroid attachment and innervation
A
- Thyroid cartilage and manubrium (deeper than sternohyoid)
- C1-3
10
Q
Thyrohyoid attachment and innervation
A
- Thyroid cartilage and hyoid bone
- C1 via hypoglossal
11
Q
Omohyoid attachment and innervation
A
- Scapula, clavicle (intermediate tendon) and hyoid bone
- C1-3
12
Q
Hyoglossus
A
- Hyoid, side of tongue
- Depresses, retracts tongue
13
Q
Thyroid gland: structure and location
A
- Endocrine gland lies in visceral compartment of the neck between C5-T1
- Left and right lobes connected by isthmus
14
Q
Thyroid gland: development
A
- Forms in the floor of primitive pharynx, near the base of tongue and descends
- Attached to trachea so ascends during swallowing
15
Q
Thyroid gland: arterial supply
A
- Superior thyroid artery (first branch of ECA) (superior and anterior)
- Inferior thyroid anterior (thyrocervical/subclavian branch) (posteroinferior)
