Origins Flashcards
What is the origin of rectus abdominus
Lateral head: pubic crest and pubic tubercle
Medial head: anterior region of pubis symphysis
What is the origin of transversus abdominus
Costal cartlidge of ribs 7-12 Thoracolumbar fascia (deep) Iliac crest ASIS Iliopsoas fascia
What is the origin of external oblique
Ribs 5-12
What is the origin of internal oblique
Thoracolumbar fascia (deep)
Iliac crest
ASIS
Iliopsoas fascia
What is the origin of diaphragm
Costal: ribs 7-12
Lumbar: L1-L3 bodies and IV discs, anterior longitudinal ligament
Sternal: xiphoid process
What is the origin of psoas major
Superficial layer: vertebral bodies and IV discs of T12-L4
Deep layer: costal processes of L1-L4
What is the origin of psoas minor
Vertebral bodies and IV discs of T12-L1
What is the origin of ilacus
Iliac fossa
What is the origin of quadratus lumborum
Iliac crest and iliolumbar ligament
What is the origin of external, internal, innermost intercostals
Lower border of rib to superior border of rib above
(External: run oblique down)
(Internal and innermost: run oblique up)
What is the origin of transversus thoracis
Sternum and xiphoid process
What is the origin of diaphragm hiatus
Esophageal, aortic, CAVAL opening: lumbar part of diaphragm
What is the origin of diaphragm crura
L and R lumbar part of diaphragm
What is the origin of levator ani
Puborectalis: superior pubic Ramus
Pubococcegeous: pubis( lateral to puborectalis )
Iliococcygeous: tendinous arch
What is the origin of coccygeus
Coccyx
What is the origin of piriformis
Pelvic surface of sacrum
What is the origin of Obturator internus
Obturator membrane
What is the origin of ishiocavernosus
Ishial spine
What is the origin of bulbospongiosus
Runs anteriorly from perineal body to clitoris or penile raphe
What is the origin of superior transverse perineal
Ishial Ramus
What is the origin of external anal spinchter
Encircles anus( posteriorly from perineal body to anococcygeous)
What is the origin of omohyoid
Superior border of scapula
What is the origin of sternohyoid
Manubrium and sternoclavicular joint
What is the origin of sternothyroid
Posterior surface of manubrium
What is the origin of thyrohyoid
Thyroid cartlidge
What is the origin of masseter
Zygomatic arch
What is the origin of temporalis
Inferior temporal line of temporal Fossa
What is the origin of lateral pterygoid
Superior: greater wing of sphenoid bone
Inferior: lateral pterygoid plate
What is the origin of medial pterygoid
Superficial: maxilla
Deep: medial surface of lateral pterygoid plate, pterygoid Fossa
What is the origin of platysma
Skin on neck
What is the origin of digastric
Anterior belly: digastric Fossa of mandible
Posterior belly: mandibular notch of temporal bone
What is the origin of Stylohyoid
Styloid process of temporal bone
What is the origin of mylohyoid
Mylohyoid line of mandible
What is the origin of geniohyoid
Inferior mental spine of mandible
