muscle charts (head/neck/thorax) Flashcards by Cameron Forbes

rectus capitis posterior major

attachments: spinous process C2 > lateral aspect inferior nuchal line
function: extension, ipsilateral rotation
innervation: suboccipital n.

How well did you know this?

Not at all

Perfectly

rectus capitis posterior minor

attachments: tubercle on posterior arch C1 > medial aspect inferior nuchal line
function: extension
innervation: suboccipital n.

How well did you know this?

Not at all

Perfectly

obliquus capitis inferior (inferior oblique)

attachments: spinous process C2 > transverse process C1
function: ipsilateral rotation
innervation: suboccipital n.

How well did you know this?

Not at all

Perfectly

obliquus capitis superior (superior oblique)

attachments: transverse process C1 > area between superior and inferior nuchal lines on occipital bone
function: extension, lateral flexion
innervation: suboccipital n.

How well did you know this?

Not at all

Perfectly

anterior digastric

attachments: digastric foss of mandible > intermediate tendon
- greater cornu of hyoid, inferior border of mandible near sumphysis > intermediate tendon and body and cornu of hyoid
action: depression of mandible, elevation of hyoid
innervation: mylohyoid branch of inferior alveolar n. (from CN V3)
suprahyoid

How well did you know this?

Not at all

Perfectly

posterior digastric

attachments: temporal mastoid notch > intermediate tendon
- greater cornu of hyoid, mastoid process > intermediate tenon and body and cornu of hyoid
action: depression of mandible, elevation of hyoid
innervation: facial n. (CN VII)
suprahyoid

How well did you know this?

Not at all

Perfectly

geniohyoid

attachments: inferior genial tubercle of mandible > anterior aspect of body of hyoid
- median ridge of mandible > body of hyoid
action: elevation of tongue and hyoid, depression of mandible
innervatoin: ventral ramus of C1 via CN XII
suprahyoid

How well did you know this?

Not at all

Perfectly

longus capitis

attachments: anterior tubercle of transverse processes of cervical vertebrae > basilar occipital bone
action: flexion of head and neck (bilateral), ipsilateral rotation (unilateral)
innervation: ventral rami of cervical spinal n. (C1-3)

How well did you know this?

Not at all

Perfectly

longus colli (L. neck)

attachments: cervical vertebral bodies > cervical vertebral bodies and transverse processes
actoin: flexion/lateral flexion of neck, ipsilateral rotation
innervation: ventral rami of cervical spinal n. (C2-7)

How well did you know this?

Not at all

Perfectly

mylohyoid

attachments: mylohyoid line of mandible > midline rache and anterior aspect of hyoid
function: elevation of floor of oral cavity
innervation: mylohyoid branch of inferior alveolar n. (from CN V3)
suprahyoid

How well did you know this?

Not at all

Perfectly

omohyoid (G. omos, shoulder)

attachments: superior border of scapula medial to scapular notch > lateral aspect of hyoid, passing through intermediate tendon sling loosely associated with clavicle and first rib
actions: depression of hyoid
innervation: ansa cervicalis (C1-3)
infrahyoid

How well did you know this?

Not at all

Perfectly

anterior scalene

attachments: anterior tubercles of middle cervical vertebrae > scalene tubercle of 1st rib
action: elevation of first rib in forced inspiration, flexion/lateral flexion/contralateral rotation of neck
innervation: lower ventral rami of cervical spinal n.

How well did you know this?

Not at all

Perfectly

middle scalene

attachments: transverse processes of cervical vertebrae > first rib
action: elevation of first rib in forced inspiration, lateral flexion/contralateral rotation of neck
innervation: lower ventral rami of cervical spinal n.

How well did you know this?

Not at all

Perfectly

posterior scalene

attachments: lower cervical transverse processes > 2nd rib
action: elevation of rib in forced inspiration, lateral flexion/contralateral rotation of neck
innervation: ventral rami of cervical spinal n. (C6-8)

How well did you know this?

Not at all

Perfectly

sternocleidomastoid

attachments: lateral aspect of mastoid process, superior nuchal line > manubrium, medial 2/3 of clavicle
action: flexion/ipsilateral lateral flexion/extension of head and neck, contralateral rotation of head
innervation: accessory n. (CN XI), C1-2

How well did you know this?

Not at all

Perfectly

sternohyoid

attachments: posterior side of proximal clavicle, adjacent manubrium > inferior border of body of hyoid
action: depresses hyoid
innervation: ansa cervicalis (C1-3)
infrahyoid

How well did you know this?

Not at all

Perfectly

sternothyroid

attachments: posterior aspect of manubrium, costal cartilage of first rib > thyroid lamina
action: depression of elevated larynx
innervation: ansa cervicalis (C1-3)
infrahyoid

How well did you know this?

Not at all

Perfectly

stylohyoid

attachments: styloid process of temporal bone > greater cornu of hyoid bone
action: elevation/retraction of hyoid
innervation: facial n. (CN VII)
suprahyoid

How well did you know this?

Not at all

Perfectly

thyrohyoid

attachments: thyroid lamina > greater horn of hyoid bone
actions: depresses hyoid, elevation of thyroid cartilage
innervation: ventral ramus of C1 via XII
infrahyoid

buccinator (L. bucca, cheek)

attachments: alveolar processes of maxilla and mandible, pterygoid hamulus and pterygomandibular raphe > angle of mouth
action: compresses cheek
innervation: buccal branch of facial n.

depressor anguli oris

attachments: mandible > angle of mouth
action: depresses buccal angle laterally
innervation: buccal and mandibular branch of facial n.

frontalis

attachments: superficial fascia of eyebrows > epicranial aponeurosis
actions: protracts scalps, elevates eyebrows and nose
innervation: temporal branch of facial n.

levator labii superioris

attachments: inferior orbital margin > lateral aspect of upper lip
action: raises and everts upper lip
innervation: buccal and zygomatic branches of facial n.

nasalis

attachments: maxilla (lateral and inferior to nasal notch) > bridge and ala of nose
action: transverse fibers compress, alar fibers wide nasal aperature
innervation: buccal branch of facial n.

orbicularis oculi

* attachments: orbital margin and medial palpebral ligament \> superficial fascia of eyelid * action: palpebral sphincter (closes eyes) * innervation: temporal and zygomatic branches of facial n.

orbicularis oris

* attachments: angle of mouth \> superficial fascia of upper lip * action: oral sphincter (closes mouth) * innervation: buccal and mandibular branches of facial n.

platysma (G. platys, flat, broad)

* attachments: lower border of mandible \> superficial fascia of skin of neck overlying clavicle * action: wrinkles anterior nuchal skin * innervation: cervical branch of facial n.

zygomaticus major (G. zygon, yoke, joining or pair)

* attachments: zygomatic bone \> angle of mouth * action: raises angle of mouth * innvervation: buccal and zygomatic branches of facial n.

inferior oblique

* innervation: inferior ramus of oculomotor n.

inferior rectus

* innervation: inferior ramus of oculomotor n.

levator palpebrae superioris

* superior ramus of oculomotor n.

medial rectus

* innervation: inferior ramus of oculomotor n.

superior rectus

* innervation: suprior ramus of oculomotor n.

lateral rectus

* innervation: abducens n.

superior oblique

* innervation: trochlear n.

masseter

* attachments: zygomatic arch \> angle of mandible, lateral aspect of ramus * action: elevation, protraction, retraction (deep fibers) of mandible * innervatoin: mandibular nerve (from trigeminal n.)

temporalis

* attachments: temporal fossa \> coronoid process, anterior border of ramus of mandible * action: elevation and retraction (posterior aspect of muscle) of mandible * innervation: mandibular nerve (from trigeminal n.)

lateral pterygoid

* attachments: infratemporal surface of spheroid, lateral surface of terygoid plate \> neck of mandible, TMJ disc * action: depresses mandible, protracts and acts with ipsilateral medial pterygoid to rotate mandible to roduce side-to-side movements in chewing * innervation: mandibular nerve (V3)

medial pterygoid

* attachments: medial surface of lateral pterygoid plate, adjacent maxilla \> medial aspect of angle of mandible * action: elevation of mandible, acts with ipsilateral pterygoid to rotate mandible for side-to-side movements of food * innervation: mandibular nerve (from trigeminal n.)

splenius capitis (G. splenion, bandage)

* attachments: ligamentum nuchae, lower cervical and upper thoracic spinous processes \> lateral third of superior nuchal line * action: extension, lateral flexion, ipsilateral rotation of head * innervation: dorsal rami of cervical spinal n.

longissimus capitis

* attachments: upper thoracic transverse processes \> posterior margin of mastoid process * action: extension, lateral flexion, ipsilateral rotation of head * innervation: dorsal rami of spinal n.

semispinalis capitis

* attachments: upper thoracic and cervical spinous processes \> occipital bone between inferior and superior nuchal lines * actions: extension, contralateral rotation of head * innervation: dorsal rami of cervical spinal n.

external intercostal

* attachments: rib \> rib * oriented from superior-lateral to inferior-medial (down and in) * action: elevation of ribs * innervation: intercostal nerve * segmental

internal/innermost intercostal

* attachments: rib \> rib * oriented from superior-medial to inferior-lateral (down and out) * action: depression of ribs * innervation: intercostal n. * segmental

transversus thoracis

* attachments: posterior sternum \> costal cartilages * action: depression of ribs * innervation: intercostal nn. * segmental

diaphragm

* attachments: xiphoid process, inner surface of lower ribs, costal cartilages, lumbar vertebrae (crura) \> central tendon * action: inspiration * negative thoracic pressure by inferior displacement * innervation: phrenic nerve * C3-5