anatomy muscle 2
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18 terms
Terms | Definitions |
|---|---|
 scalenes(anterior,middle,posterior) | origin:tranverse process of cervical vertebrae insertion:ribs1 and 2 action:flexes and rotates neck,elevates ribs 1 and 2 |
| sternocleidomastoid | origin:manubrium and clavicle insertion:mastoid process action:one rotates and extends neck;both:flex neck |
| frontalis | origin:galea aponeurotica insertion:skin superior to orbit action:raises eyebrows,draws scalp anteriorly |
| orbicularis oculi | origin:frontal bone, maxilla insertion:skin of eyelid action:closes eye |
| orbicularis oris | origin:fascia of facial muscles,maxilla and mandible insertion:skin of lips action:closes lips |
| corrugator supercilii | origin:nasal ridge,orbicularis oculi insertion:skin of eyebrow action:depresses and pulls eyebrows together |
| zygomaticus(major and minor) | origin:zygomatic bone insertion:muscle and skin at angle of mouth action:elevates and abducts upper lip |
| buccinator | origin:maxilla,mandible insertion:orbicularis oris at angle of mouth action:retracts angle of mouth,flattens cheek |
| temporalis | origin:temporal fossa insertion:coronoid process,mandibular ramus action:elevates and retracts madible |
| masseter | origin:zygomatic arch insertion:lateral ramus of mandible action:elevates and protracts mandible |
| pterygoids(medial and lateral) | origin:pterygoid plate of sphenoid bone insertion:medial ramus and condylarprocess of madible action:protracts,elevates,and depresses madible(for chewing) |
| external abdominal oblique | origin:ribs5-12 insertion:inguinal ligament iliac crest,rectus sheath action:compresses abdominal wall,laterally rotates trunk |
| rectus abdominis | origin:pubis crest,symphysis pubis insertion:inferior ribs,xiphoid process action:flexes vertebral column,compresses abdominal wall |
| serratus anterior | origin:ribs1-9 insertion:medial bordor of scapula action:abducts scapula |
| diaphragm | origin:xiphoid process,lower ribs,upper lumbar vertebrae insertion:central tendon action:inspiration |
| external intercostalis | origin:inferior margin of a rib insertion:superior margin of a rib below action:elevates ribs,inspiration |
| internal intercostalis | origin:superior margin of a rib insertion:inferior margin of a rib above action depresses ribs, expiration |
| splenius | origin:C4-T6 insertion:occipital bone and temporal bone action:extends and rotates head |
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