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Muscles
Muscles of the Thorax, That move the Head, and Abdominal Wall
| Term | Definition |
|---|---|
| External Intercostals | Origin: Ribs (lower eight) Insertion: Pelvis (iliac crest & pubis by way on inguinal ligament) Function: Compress abdomen Nerve supply: Lower 7 Intercostal & iliohypogastric nerves |
| Internal Intercostals | Origin: Pelvis (iliac crest & iliopsoas fascia, lumborodorsal fascia) Insertion: Lower 3 ribs, Linea alba Function: Pull the front of the pelvis upward, flattening the lumbar curve of spine; when these muscles lose their tone, common figure faults of pr |
| Diaphragm | Origin: Lower circumfrance of thorax Insertion: Central Tendon of diaphragm Function: Enlarges thorax, thereby causing inspiration Nerve Supply: Phrenic nerves |
| Sternocleidomastoid (head) | Origin: Sternum, clavicle Insertion: Temporal bone (mastoid process) Function: Flexes head and neck, rotates head Nerve Supply: Accessory nerve |
| Trapezius (head) | Origin: Occipital bone, vertebrae Insertion: Occipital bone, superior and inferior Function: Raises and lowers shoulders (shrugs) |
| Semispinalis capitis (head) | Origin: Vertebrae, upper 6 thoracic, lower 4 cervcal Insertion: Occipital bone between superioi and inferior nuchal lines Function: Extends head and neck, bends and rotates head Nerve Supply: First 5 cervicle nerves |
| Splenius Capitis (head) | Origin: Ligamentum nuchae, vertebrae Insertion: Temporal bone (mastoid process), Occipital bone Function: Extends head and neck, bends and rotates head toward same side Nerve Supply: 2nd, 3rd & 4th cervical nerves |
| External oblique | Origin: Ribs (lower 8) Insertion: Pelvis iliac crest and pubis by inguinal ligament), Function: Compress abdomen Nerve Supply: Lower 7 intercostal nerves & iliohypogastric nerves |
| Internal Oblique | Origin: Pelvis, lumbodonorsal fascia Insertion: Ribs, Linea alba Function: Important posture support Nerve Supply: Lasy 3 intercostal nerves, iliohypogastric & iloinguinal nerves |
| Transverse Abdominus | Origin: Ribs (lower6), Pelvis, Lumbordosal fascia Insertion: Pubic bone, linea alba, ribs (costal cartilage of 5th, 6th, and 7th nerves Function: Same as external oblique Nerve Supply: Same as external oblique |
Created by:
asalmeron
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