Muscles of Neck Flashcards
Name muscle A.
Mylohyoid muscle
Name muscle B.
Sternohyoid
Name muscle C.
Omohyoid
Name muscle D.
Sternothyroid
Name muscle E.
Sternocleidomastoid
Name muscle F.
Thyrohyoid
Name muscle A.
Stylohyoid
Name muscle B.
Mylohyoid
Name muscle C.
Anterior belly of digastric muscle.
Name muscle D.
Thyrohyoid
Name muscle E.
Anterior scalene
Name muscle F.
Middle scalene
Name muscle G.
Posterior scalene
Name muscle H.
Sternocleidomastoid
Name muscle I.
Posterior belly of digastric muscle.
What is the origin of the mylohyoid muscle?
Mylohyoid line of mandible
What is the insertion of the mylohyoid muscle?
Mylohyoid raphe and body of hyoid bone.
What is the action of the mylohyoid muscle?
Elevates floor of mouth.
Describe the innervation of the mylohyoid muscle.
Nerve to mylohyoid muscle (CN V3)
Describe the blood supply to the mylohyoid muscle
Sublingual and submental arteries, suprahyoid branch of lingual artery; mylohyoid and mental branches of inferior alveolar artery
What is the insertion of the sternohyoid muscle?
Inferior border of body of hyoid bone.
What is the origin of the sternohyoid muscle
Sternal end of clavicle and posterior surface of manubrium of sternum
Describe the action of the sternohyoid muscle
Depresses hyoid bone
Describe the innervation of the sternohyoid muscle
Ansa cervicalis (C1-C3) from anterior rami of cervical plexus
Describe the blood supply of the sternohyoid muscle
Infrahyoid branch of superior thyroid artery
Describe the origin of the inferior belly of the omohyoid muscle.
Superior border of scapula, medial to superior scapular notch.
Describe the origin of the superior belly of the omohyoid muscle.
Intermediate tendon
Describe the insertion of the inferior belly of the omohyoid muscle.
Intermediate tendon
Describe the insertion of the superior belly of the omohyoid muscle.
Body of hyoid bone.
Describe the action of the omohyoid musce
Depresses hyoid bone
Describe the innervation of the inferior belly of the omohyoid muscle.
ansa cervicalis (C1-C3)
Describe the innervation of the superior belly of the omohyoid muscle.
Ansa cervicalis (C1)
Describe the arterial supply of the omohyoid muscle.
Infrahyoid branch of superior thyroid artery.
Describe the origin of the sternothyroid muscle.
Posterior surface of manubrium of sternum and costal cartilage of first rib
Describe the insertion of the sternothyroid muscle.
Oblique line of thyroid cartilage of larynx.
Describe the action of the sternothyroid muscle.
Depresses larynx
Describe the innervation of the sternothyroid muscle.
Ansa cervicalis (C1-C3), from anterior rami of cervical plexus
Describe the blood supply to the sternothyroid muscle.
Infrahyoid branch of superior thyroid artery
Describe the origin of the thyrohyoid muscle
Oblique line of thyroid cartilage
Describe the insertion of the thyrohyoid muscle
Inferior aspects of body of greater horn of hyoid bone
Describe the action of the thyrohyoid muscle.
Depresses hyoid bone; elevates larynx
Describe the innervation of the thyrohyoid bone.
Branch of anterior rami of C1 which accompanies hypoglossal nerve.
Describe the blood supply to the thyrohyoid muscle.
Infrahyoid branch of superior thyroid artery.
Describe the origin of the stylohyoid muscle.
Styloid process of temporal bone
Describe the insertion of the stylo hyoid muscle.
Body of hyoid bone
Describe the action of the sylohyoid muscle.
Elevates hyoid bone
Describe the innervation of the stylohyoid muscle.
Stylohyoid branch of facial nerve
Describe the blood supply to the stylohyoid muscle.
Facial, posterior auricular and occipital arteries
Describe the origin of the anterior belly of the digastric muscle.
Digastric fossa of mandible
Describe the insertion of the anterior belly of the digastric muscle.
Intermediate tendon of digastric muscle
Describe the action of the anterior belly of the digastric muscle.
Depresses mandible and elevates hyoid bone/
Describe the innervation of the anterior belly of the digastric muscle
Digastric branch of nerve to mylohyoid muscle
Describe the blood supply to the anterior belly of the digastric muscle.
Submental artery
Describe the origin of the anterior scalene muscle.
Anterior tubercles of transverse processes of C3-C6 vertebrae.
Describe the insertion of the anterior scalene muscle.
Scalene tubercle of first rib.
Describe the action of the anterior scalene muscle.
Flexes, rotates and laterally flexes the neck;
elevates first rib
Describe the innervation of the anterior scalene muscle.
Anterior rami of fourth to sixth cervical nerves.
Describe the blood supply to the anterior scalene muscle.
Ascending cervical artery
Describe the origin of the middle scalene muscle.
Transverse processes of C2-C7 vertebrae.
Describe the insertion of the middle scalene muscle.
Superior surface of first rib.
Describe the action of the middle scalene muscle.
Laterally flexes neck;
elevates first rib.
Describe the innervation of the the middle scalene muscle.
Anterior rami of third to eighth cervical nerves.
Describe the blood supply to the middle scalene muscle.
Ascending cervical artery.
Describe the origin of the posterior scalene muscle.
Posterior tubercles of transverse processes of C4-C6 vertebrae.
Describe the insertion of the posterior scalene muscle
External surface of second rib.
Describe the action of the posterior scalene muscle.
Laterally flexes neck;
elevates second rib
Describe the innervation of the posterior scalene muscle
Anterior rami of fourth to sixth cervical vertebrae
Describe the blood supply to the posterior scalene muscle
Ascending cervical artery
Describe the origin of the posterior belly of digastric muscle.
Mastoid notch of temporal bone
Describe the insertion of the posterior belly of digastric muscle
Intermediate tendon of digastric muscle.
Describe the action of the posterior belly of digastric muscle.
Depresses mandible;
elevates hyoid bone
Describe the innervation of the posterior belly of digastric muscle.
Digastric branch of facial nerve.
Describe the blood supply to the posterior belly of digastric muscle.
Posterior auricular and occipital arteries.
