Skip to: Top | Bones | Bony Landmarks | Muscles
Origin | Omohyoid: Superior border of scapula
Sternohyoid and Sternothyroid: Manubrium |
Insertion | Omohyoid and Sternohyoid: Hyoid bone Sternothyroid: Thyroid cartilage |
Actions | Depress hyoid bone and thyroid cartilage |
Origin | Zygomatic Arch |
Insertion | Angle And Ramus Of Mandible |
Actions | Elevate The Mandible |
Origin | Frontalis and Occipitalis: Galea aponeurotica |
Insertion | Frontalis: Skin over eyebrows Occipitalis: Superior nuchal line of occiput |
Actions | Frontalis raises eyebrows and wrinkles
forehead Occipitalis anchors and retracts galea posteriorly |
Origin | |
Insertion | |
Actions |
Origin | Fascia covering superior part of pectoralis major |
Insertion | Edge of mandible, skin of lower part of face |
Actions | Assists depression of mandible (TMJ) tightens neck fascia |
Origin | TVPs Of 3rd To 6th Cervical Vertebrae |
Insertion | First Rib |
Actions | Bilateral: Elevate Ribs During Inhalation,
Flex Head and Neck Unilateral: With Rib Fixed, Laterally Flex Neck (Anterior And Middle), Rotate Head and Neck to Opposite Site (Anterior And Middle) |
Origin | TVPs Of 2nd To 7th Cervical Vertebrae |
Insertion | First Rib |
Actions | Bilateral: Elevate Ribs During Inhalation,
Flex Head And Neck Unilateral: With Rib Fixed, Laterally Flex Neck (Anterior And Middle), Rotate Head And Neck To Opposite Site (Anterior And Middle) |
Origin | TVPs Of 5th And 6th Cervical Vertebrae |
Insertion | Second Rib |
Actions | Bilateral: Elevate Ribs During Inhalation, Flex Head and Neck |
Origin | Sternal: Head Top Of Manubrium
Clavicular: Head Medial One-Third Of Clavicle |
Insertion | Mastoid Process Of Temporal Bone, Lateral Superior Line Of Occiput |
Actions | Unilateral: Laterally Flex Head To Same
Side, Rotate Head To Opposite Side Bilateral: Flex Neck, Assist In Inspiration |
Subprahyoids | Digastric | |
Origin | Geniohyoid and Mylohyoid – underside of
mandible Stylohyoid – Styloid process |
Mastoid process deep to SCM and splenius capitis |
Insertion | Hyoid bone | Inferior border of mandible |
Actions | Elevate hyoid and tongue, depress mandible (TMJ) | With hyoid bone fixed depresses mandible
(TMJ) With mandible fixed elevates hyoid Retracts mandible |
Origin | Temporal Fossa And Fascia |
Insertion | Coronoid Process Of The Mandible |
Actions | Elevate, Retract The Mandible |