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Cat Muscles I
Head, neck, & trunk
| Term | Definition |
|---|---|
| Digastric | O: Jugular and mastoid process. I: mandible. A: Lowers mandible |
| External intercostals | O: Border of rib. I: Border of adjacent rib. A: Protracts ribs |
| External oblique | O: lumbodorsal fascia & ribs. I: aponeurosis on linea alba. A: compresses abdominal viscera |
| Internal intercostals | O: Border of rib. I: Border of adjacent rib. A: Retracts ribs |
| Internal oblique | O: innominate bone & lumbodorsal fascia. I: aponeurosis on linea alba. A: compresses abdominal viscera |
| Latissimus dorsi | O: lumbodorsal fascia & neural spines of the last thoracic and lumbar vert. I: medial surface of humerus. A: draws humerus caudad |
| Masseter | O: zygomatic arch. I: mandible. A: elevates mandible |
| Mylohyoid | O: Mandible. I: Median raphe. A: Raises floor of mouth |
| Rectus abominis | O: pubic symphysis. I: sternum and costal cartilages. A: flexes trunk and compresses abdominal viscera |
| Rhomboideus | O: neural processes of thoracic. I: vertebrae ventral border of scapula. A: draws scapula dorsally |
| Rhomboideus capitis | O: superior nuchal line. I: angle of scapula. A: draws scapula craniad |
| Scalenus | O: anterior ribs 2 & 3. I: cervical vertebrae. A: flexes neck |
| Serratus dorsalis | O: Last 4 ribs. I: Spines of lumbar vertebrae. A: Pulls rib anterior |
| Serratus ventralis | O: 1st ten ribs. I: vertebral border of scapula. A: draws scapula ventrally and craniad |
| Splenius | O: mid-dorsal fascia of the neck. I: nuchal line. A: turns and elevates the head |
| Sternohyoid | O: First costal rib. I: Body of hyoid. A: Pulls hyoid posterior |
| Sternomastoid | O: Manubrium. I: Lambdoidal ridge and mastoid process. A: Turns and lowers head |
| Temporalis | O: lambdoidal crest & zygomatic process of frontal bone. I: coronoid process of mandible. A: elevates mandible |
| Transversus "abdominus" & costarum | O: ilium, lumbar vertebrae, & posterior ribs. I: linea alba. A: compresses abdominal viscera |
| Xiphihumeralis | O: xiphoid process. I: proximal end of humerus. A: adducts and rotates the forelimb |
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