Muscles Upper Body Back/neck/face Flashcards
(23 cards)
Temporalis
O: temporal fossa
I: coronoid process of mandible
A: chews
Masseter
O: zygomatic arch
I: mandible
A: clench jaw
Scalenes
O: tvp C2-C7
I: ant/mid: 1st rib
Post: 2nd rib
A: neck flexion, Laterally flex neck to same side, Rotate neck to opposite side
Sternocleidomastoid
O: sternal head: top of manubrium
Clavicular head: medial 1/3 clavicle
I: mastoid process of temporal bone
& lateral superior nuchal line of occiput
A: flex neck, laterally flex head/neck same side, rotates head/neck to opposite side
Longus capitis
O: tvp C3-C6
I: ant/inf surface of base of occiput
A: flex neck/head same side, rotates head/neck same side
Longus colli
O: bodies of C5-T3 & tvp C3-C5
I: tubercle on ant arch of atlas, body C3-C4, tvp C5-C6
A: flex neck, laterally flex head/neck same side, rotates neck/head same side
Rectus capitus posterior major
O: Spinous Process of C2
I: Inferior nuchal line (lateral to rectus capitus posterior minor)
A: Head/ neck extension and ipsilateral rotation
Innervation: Suboccipital nerve
Rectus Capitus Posterior Minor
O: Posterior tubercle of C1
I: Inferior nuchal line (medial)
A: Head/neck extension
N: Suboccipital nerve
Obliquus Capitus Superior
O: Transverse process of Cl
I: between superior and inferior nuchal lines
A: Head/neck extension; ipsilateral side flexion
N: Suboccipital nerve
Obliquus Capitus Inferior
Origin: Spinous process of C2 (lateral aspect on each side)
I: Transverse process of Cl
A: Ipsilateral rotation of head/neck)
N: Suboccipital nerve
Rectus Abdominis
O: sup surface of pubis
I: xiphoid process, inf surface costal cartilage ribs 5-7
A: depress ribs, flexes vertebral column
External oblique
O: external inferior borders 5-12
I: ant aspect iliac crest, linea alba A
A: rotates trunk contra-laterally, depresses ribs, flexes spine
Internal oblique
O: lateral inguinal ligament, thoracodorsal fascia, iliac crest
I: internal surfaces ribs t10-t12, linea alba
A: compresses abdomen, depress ribs, flexes spine, rotate spine ipsilaterally
Transverse Abdominus
O: lateral inguinal ligament, internal surfaces 6-12, iliac crest, thoracolumbar fascia
I: linea alba
A: compresses abdomen
Quadratus lumborum
O: posterior iliac crest
I: 12th rib & tvp L1-L4
A: depress ribs breathing, lateral flex spine
Diaphragm
O: xiphoid process, inner surfaces ribs 6-12, ant bodies L1-L2
I: central tendinous sheath
A: expands thoracic cavity and contracts thoracic cavity
N: phrenic n.
External intercostal
O: inf border of each rib
I: superior borders of inf rib
A: elevates ribs (inspiration)
Internal intercostal
O: inf border of each rib
I: superior borders of inf rib
A: depress ribs (expiration)
Splenius capitis
O: ligamentum nuchae, spinous process C7-T4
I: mastoid process & superior nuchal line
A: neck extension, rotates & laterally flexes on same side
Splenius cervicus
O: spinous processes t3-t6
I: tvp c1-c3
A: neck extension, rotates & laterally flexes on same side
Serratus posterior
Superior
O: spinous processes c7-t3
I: posterior of ribs 2-5
A: elevation of ribs 2-5
Inferior
O: spinous processes of t12-L3
I: posterior ribs 9-12
A: depress ribs, trunk extension, same side trunk rotation
Multifidus
O: sacrum and tvp L5-C4
I: spinous processes 2-4 more sup vertebrae
A: extends spine, contralateral rotation of spine
Rotatores
O: tvp L5-C3
I: spinous processes 1-2 more sup vertebrae
A: extends spine contralateral rotation of spine
