Anterolateral Neck Muscles (Distinguish Anterior muscles for LOs) Flashcards
Anterior digastric (Suprahyoid) - Attachments
FROM
*digastric fossa of the mandible
TO
*the intermediate tendon (greater cornu of hyoid) (inferior border of mandible near symphysis to intermediate tendon & body and cornu of hyoid)
Anterior digastric (Suprahyoid) - Actions
*depression of the mandible
OR
*elevation of the hyoid
Anterior digastric (Suprahyoid) - Innervation
mylohyoid branch of the inferior alveolar n. (from CN V3)
Posterior digastric (Suprahyoid) - Attachments
FROM
*temporal mastoid notch
TO
*intermediate tendon (greater cornu of hyoid) (mastoid process to intermediate tendon & body and cornu of hyoid)
Posterior digastric (Suprahyoid) - Actions
*depression of the mandible
OR
*elevation of the hyoid
Posterior digastric (Suprahyoid) - Innervation
Facial n. (CN VII)
Mylohyoid (Suprahyoid) - Attachments
FROM
*mylohyoid line of the mandible
TO
*midline raphe
*anterior aspect of body of the hyoid
Mylohyoid (Suprahyoid) - Actions
elevation of the floor of the oral cavity
Mylohyoid (Suprahyoid) - Innervation
mylohyoid branch of the inferior alveolar n. (from CN V3)
Geniohyoid (Suprahyoid) - Attachments
FROM
*inferior genial tubercle of the mandible
TO
*anterior aspect of the body of the hyoid (median ridge of mandible to body of hyoid)
Geniohyoid (Suprahyoid) - Actions
*elevation of tongue and hyoid
OR
*depresses mandible
Geniohyoid (Suprahyoid) - Innervation
ventral ramus of C1 via CN XII
Stylohyoid (Suprahyoid) - Attachments
FROM
*styloid process of temporal bone
TO
*body of hyoid bone
Stylohyoid (Suprahyoid) - Actions
elevation & retraction of the hyoid
Stylohyoid (Suprahyoid) - Innervation
Facial n. (CN VII)
Omohyoid (Infrahyoid) - Attachments
There are both superior and inferior bellies that form cervical triangles
FROM
*superior border of the scapula medial to the scapular notch
TO
*lateral aspect of the hyoid passing through an intermediate tendon sling loosely associated with the clavicle & 1st rib
Omohyoid (Infrahyoid) - Actions
depression of the hyoid
Omohyoid (Infrahyoid) - Innervation
ansa cervicalis (C1-3)
Sternohyoid (Infrahyoid) - Attachments
FROM
*posterior side of the proximal clavicle & adjacent manubrium
TO
*inferior border of body of the hyoid
Sternohyoid (Infrahyoid) - Actions
depresses the hyoid
Sternohyoid (Infrahyoid) - Innervation
ansa cervicalis (C1-3)
Sternothyroid (Infrahyoid) - Attachments
FROM
*posterior aspect of the manubrium & costal cartilage of 1st rib
TO
*thyroid lamina
Sternothyroid (Infrahyoid) - Actions
depression of the elevated larynx
Sternothyroid (Infrahyoid) - Innervation
ansa cervicalis (C1-3)
Thyrohyoid (Infrahyoid) - Attachments
FROM
*thyroid lamina
TO
*greater horn of the hyoid bone
Thyrohyoid (Infrahyoid) - Actions
*depression of the hyoid
OR
*elevation of the thyroid cartilage
Thyrohyoid (Infrahyoid) - Innervation
ventral ramus of C1 via XII
Longus capitis - Attachments
FROM
*anterior tubercles of the transverse processes of cervical vertebrae
TO
*basilar occipital bone
Longus capitis - Actions
flexion of the head & neck (bilateral) ipsilateral rotation (unilateral)
Longus capitis - Innervation
ventral rami of cervical spinal n. (C1-3)
Longus colli (L. neck) - Attachments
FROM
*cervical vertebral bodies
TO
*cervical vertebral bodies
*transverse processes
Longus colli (L. neck) - Actions
flexion, lateral flexion of the neck and ipsilateral rotation
Longus colli (L. neck) - Innervation
ventral rami of cervical spinal n. (C2-7)
Anterior scalene - Attachments
FROM
*anterior tubercles of middle cervical vertebrae
TO
*scalene tubercle of the 1st rib
Anterior scalene - Actions
*elevation of 1st rib (during forced inspiration)
*flexion, lateral flexion, & contralateral rotation of the neck
Anterior scalene - Innervation
lower ventral rami of cervical spinal n.
Middle scalene - Attachments
FROM
*transverse processes of cervical vertebrae
TO
*1st rib
Middle scalene - Actions
*elevation of 1st rib (during forced inspiration)
*lateral flexion
*contralateral rotation of the neck
Middle scalene - Innervation
lower ventral rami of cervical spinal n.
Posterior scalene - Attachments
FROM
*lower cervical transverse processes
TO
*2nd rib
Posterior scalene - Actions
*elevation of the rib (during forced inspiration)
*lateral flexion
*contralateral rotation of the neck
Posterior scalene - Innervation
ventral rami of cervical spinal n. (C6-8)
Sternocleidomastoid - Attachments
FROM
*lateral aspect of the mastoid process
*superior nuchal line
TO
*manubrium
*medial 1/3rd of the clavicle
Sternocleidomastoid - Actions
*flexion, ipsilateral lateral flexion, and extension of the head & neck
*contralateral rotation of the head
Sternocleidomastoid - Innervation
accessory n & C1,2
Cricothyroid - Attachments
FROM
*cricoid cartilage
TO
*thyroid cartilage
Cricothyroid - Actions
tension and elongation of the vocal folds
Cricothyroid - Innervation
external laryngeal n. (CN X)