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Anatomy muscles
Ch 9-12 muscles/study guide/martini
| Muscle | Origin | Insert | Action |
|---|---|---|---|
| Masseter | zygomatic arch | ramus of mandible | elevate mandible |
| Temporalis | temporal line of skull | coronoid process of mandible | elevate mandible |
| Buccinator | Maxilla & mandible | mandible & skin on cheek | compress cheeks |
| Zygomaticus major/minor | zygomatic bone | angle of mouth & upper lip | elevate angle of mouth (smile) |
| Buccinator | Maxilla & mandible | angle of mouth | compress cheeks |
| Depressor anguli oris | maxilla and mandible | angle of mouth | depress angle of mouth (frown) |
| Risorius | fascia of masseter | angle of mouth | lateral angle of mouth (grimace) |
| frontalis | epicranial aponeurosis (scalp) | eyebrow | elevates eyebrows;wrinkle forehead |
| Occipitalis | occipital bone superior nuchal line | epicranial aponeurosis (scalp) | tenses scalp |
| Orbicularis oris | maxillae & mandible | skin around lips | compress and purse lips (kiss) |
| Orbicularis oculi | orbit (eye bone) | eyelids | close eyelids |
| Lateral rectus Superior rectus | N/A | N/A | eye looks lateraleye looks superior |
| Inferior rectus | N/A | N/A | eye looks down/inferior |
| Medial rectus | N/A | N/a | eye looks medial/middle |
| Superior Oblique | N/A | N/A | eye looks down,then lateral |
| Inferior Oblique | N/A | N/A | eye looks up,then lateral |
| sternocleidomastoid | clavicle/ manubrium (sternum-chest) | mastoid process of temporal bone | flexes neck,lateral flexes & rotates cervical vertebral column |
| DEEP | VERTEBRAL | MUSCLES | INTER- |
| INTERSPINALES | SPINOUS PROCESS OF OF EACH VERTEBRA | SPINOUS PROCESS OF MORE SUPERIOR VERTEBRA (ON TOP) | EXTEND VERTEBRAL COLUMN |
| INTERTRANSVERSARII | TRANSVERSE PROCESS OF EACH VERTEBRAE | TRANSVERSE PROCESS OF MORE SUPERIOR VERTEBRAE | LATERAL FLEXION OF VERTEBRAL COLUMN |
| DIAPHRAGM | N/A | N/A | DEPRESS RIBS,EXPANDS THORACIC CAVITY/COMPRESS ABDOMINOPELVIC DURING RESPIRATION (BREATHING) |
| ILIOCOSTALIS THORACIS | SUPERIOR BORDERS OF RIBS 6-12 | SUPERIOR RIBS AND TRANSVERSE PROCESS OF C-7 | STABILIZE THORACIC VERTEBRAE IN EXTENSION |
| SPINALIS THORACIS | SPINOUS PROCESSES OF INFERIOR THORACIC & SUPERIOR LUMBAR | SPINOUS PROCESSES OF SUPERIOR THORACIC & LUMBAR VERTEBRAE | EXTEND VERTEBRAL COLUMN |
| LONGISSIMUS THORACIS | TRANSVERSE PROCESS OF INFERIOR THORACIC AND SUPERIOR LUMBAR VERTEBRAE | TRANSVERSE PROCESS OF SUPERIOR THORACIC & LUMBAR VERTEBRAE | EXTENSION OF VERTEBRAL COLUMN; ALONE, EACH PRODUCES LATERAL FLEXION TO THAT SIDE |