Axial Musculature Flashcards
Frontalis
Origin- Epicranial aponeurosis
Insertion- Skin of forehead
Action:Furrow Brow
Occipitalis
Origin- Superior Nuchal line of occipital
Insertion- Epicranial aponeurosis
Action- Unfurrow brow
Orbicularis oculi
Origin-Medial orbital margin
Insertion-Eyelids
Action-Close eyelids
Orbicularis oris
Origin-Surrounding lips
Insertion-lips at corner of the mouth
Action-Close lips
Depressor anguli oris
Origin-Body of mandible
Insertion-Lips at the corner of the mouth
Action-Frowning
Depressor labii inferioris
Origin-Body of mandible
Insertion-Lower lip
Action-Depress lip
Levator labii superioris
Origin-Maxilla (infraorbital margin)
Insertion- Upper lip
Action-elevates upper lip
Zygomaticus major
Origin-Temporal process of the zygomatic bone
Insertion-Lips at corner of mouth
Action-Smiling
Zygomaticus minor
Origin-Zygomatic bone (medial to major)
Insertion- Lips at corner of mouth
Action-Smiling
Buccinator
Origin-Maxilla and Mandible
Insertion-Orbicularis oris
Action-compress cheeks
Inferior rectus
Origin-Sphenoid bone around optic canal
Insertion-Inferior, medial surface of the eyeball
Action-Eye looks down
Medial rectus
Origin-sphenoid bone around optic canal
Insertion-Medial surface of eyeball
Action- eye rotates medially
Superior rectus
Origin-sphenoid bone around optic canal
Insertion-Superior surface of eyeball
Action-Eye looks up
Lateral rectus
Origin-sphenoid bone around optic canal
Insertion-lateral surface of eyeball
Action-Eye rotates laterally
Inferior oblique
Origin-maxillary bone at anterior portion of orbit
Insertion-Inferior, lateral surface of eyeball
Action-Eye rolls, looks up and to the side
Superior oblique
Origin-Sphenoid bone around optic canal
Insertion-Superior, lateral surface of eyeball
Action-Eye rolls, looks down and to the side
Masseter
Origin-Zygomatic arch
Insertion-Ramus of mandible
Action-Elevate mandible, close jaw, chew
Temporalis
Origin-Temporal line
Insertion-Coronoid process of mandible
Action-Elevate mandible
Lateral pterygoid
Origin-pterygoid process of sphenoid bone
Insertion-Mandible
Action-Depress mandible
Medial pterygoid
Origin-pterygoid process of sphenoid bone
Insertion-Mandible
Action-Elevate mandible
Genioglossus
Origin-Body of mandible
Insertion-Tongue
Action- Protract tongue
Hyoglossus
Origin-Hyoid
Insertion-Tongue
Action- Depress tongue
Styloglossus
Origin-Styloid process of temporal
Insertion-Tongue
Action-Retract tongue
Sternocleidomastoid
Origin-Calvicular head:Sternal end of clavicle/Sternal head:Manubrium
Insertion-Mastoid process
Action Rotate or flex head and neck
Omohyoid
Origin-Superior of scapula and clavicle
Insertion-Hyoid
Action-Depress hyoid and larynx
Digastric
Origin-Inferior belly:Body of mandible/Superior belly:Mastoid process
Insertion-Hyoid
Action-Depress mandible, elevate hyoid
Sternohyoid
Origin-Manubrium
Insertion-Hyoid
Action-Depress hyoid and larynx
Sternothyroid
Origin-Manubrium
Insertion-Thyroid cartilage of larynx
Action-Depress hyoid and larynx
Stylohyoid
Origin-Styloid process of temporal
Insertion-Hyoid
Action-Elevate hyoid and larynx
Splenius capitis
Origin-cervical and thoracic spinous process
Insertion-Mastoid process of temporal, nuchal lines of occipital
Action-Extend neck
Scalenes
Origin-Cervical transverse process
Insertion-Ribs 1 & 2
Action- elevate ribs
Diaphragm
Origin-Xyphoid, ribs, and lumbar vertebrae
Insertion-Central tendon at the inferior boundary of the thoracic cavity
Action- Expand thoracic cavity
External intercostals
Origin-Inferior border of ribs
Insertion-Superior border of ribs
Action-Elevate ribs
Internal intercostals
Origin-Superior border of ribs
Insertion-Inferior border of ribs
Action-Depress ribs
Rectus abdominus
Origin-pubic symphysis
Insertion-Xiphoid and costal cartilages
Action-Flex vertebral column (sit up)
External abdominal oblique
Origin-Ribs 5-12
Insertion-Iliac crest and linea alba
Action-Flex, rotate vertebral column
Internal abdominal oblique
Origin-Iliac crest and thoracolumbar fascia
Insertion-Costal cartilages and linea alba
Action-Flex, rotate vertebral column
Transversus abdominis
Origin-Ribs 7-12, iliac crest, thoracic and lumbar spinous process
Insertion-Linea alba and pubis
Action-compress abdomen
