Anterior Triangle of Neck

Question 1

Borders

Answer 1

Superior: inferior border mandible
Lateral: anterior border stern.cleido.mastoid
Medial: sagittal line down midline of neck

Question 2

Muscles

Answer 2

Suprahyoid

Infrahyoid

Question 3

Suprahyoid:

Answer 3

1. Geniohyoid
2. Digastric
3. Mylohyoid
4. Stylohyoid

Functions: swallow
move: hyoid and larynx

floor oral cavity
anchors tongue

Question 4

Infrahyoid

Answer 4

1. Thyrohyoid
2. Omohoid
3. Sternohyoid
4. Sternothyroid

Functions:
Depressing
Depresses hyoid and larynx )after swallow)
Speech

Question 5

Geniohyoid

Answer 5

O-medial mandible at chin
I- Hyoid
A- Depresses mandible/ lifts larynx
Pulls hyoid anteriorly
I- CN 1 by hypoglossal nerve (CN 12)

Question 6

Digastric

Answer 6

O-ant belly: inf. surface mandible at chin
post belly: mastoid region temporal region

I- Hyoid
A-Depresses mandible/ elevates larynx
I- Ant: mandibular branch trigeminal nerve (CN 5, CN V3)
Post- facial nerve (CN 7)

Question 7

Mylohyoid

Answer 7

O- mylohyoid line of mandible
I- median connective tissue band (raphe) that runs to hyoid bone
A- Elevates floor mouth, hyoid bone or depresses mandible
I- Trigeminal nerve (CN 5), mandibular branch

Question 8

Stylohyoid

Answer 8

O- Styloid process temporal bone
I-hyoid
A-elevates larynx
I- Facial Nerve (CN 7)

Question 9

Thyrohyoid

Answer 9

O- Thyroid cartilage larynx
I- Hyoid
A- elevates thyroid, depresses hyoid
I-C1, C2, CN 12 (hypoglossal nerve)

Question 10

Omohyoid

Answer 10

O-superior border scapula near scapula notch
I- hyoid
A- depresses hyoid and larynx
I- C2-3

Question 11

Sternohyoid

Answer 11

O-clavicle and manubrium
I-hyoid
A-depresses hyoid and larynx
I-C1-3

Question 12

Sternothyroid

Answer 12

O- dorsal manubrium, 1st costal cartilage
I- thyroid cart. of larynx
A- depresses hyoid and larynx
I- C1-3