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31 Cards in this Set
- Front
- Back
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Hyoid Muscles - action and reason
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assist in the actions of mastification and chewing
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Hyoid Muscle - location
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Superficial area of the neck (i.e. they are located close to the skin)
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Hyoid Muscles -overview
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A group of muscles located superficially in the neck (assist with chewing and swallowing). The hyoid muscles are grouped according to position (supeahyoid - high or infrahyoid - low) and if they are anterior (infront) or posterior (behind) the hyoid bone.
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Hyoid Bone
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located in the upper area of the neck. Bone runs horizontal across the neck muscles. All the hyoid muscles (whether suprahyoid or infrahyoid) are attached to the bone.
-Hyoid bone does not articulate (touch) any other bone, only ligaments or muscles (hyoid muscles) |
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Suprahyoid Bones (4)
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Staylohyoid, Geniohoid, Mylohyoid, Digastric
STAY(staylohid) DIGGING(diagastric) MY (Mylohyoid) GENNY (geniodhoid) |
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Infrahyoid Bones (4)
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Thyrohoid, Sternothyroid, Sternohyoid, Omonhyoid
T O S S |
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Suprahyoid Bones
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located superior (above) the hyoid bone
-divided into anterior or posterior posistion - |
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Anterior Suprahyoid Bone
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-at the front of the neck and above the hyoid bone
-Mylohoid, Geniohyoid -MY GENNY IS ABOVE AND AT THE FRONT |
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Geniohoid - overview
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Suprahoid (above hyoid bone)
-Anterior (at the front) -Insertion: hyoid bone (most active spot) -Origin: genial tubercles (least active) |
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Suprahyoid bones
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-located above the hyoid bone
-both anterior (above and front) and posterior (above and back) cause elevation in the hyoid bone and larynx |
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Posterior Suprahyoid Bones
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-located above the hyoid bone and at the back area of the neck
-required for lifting the hyoid and larynx |
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Anterior Suprahyoid Bones
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Located above the hyoid bone and to the back
-required for lifting the hyoid and larynx -also, depresses the mandible jaws to open |
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Digastric Muscles
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Anteior Suprahyoid
-two origins and insertions -origin: intermeditate tendon and mastoid of temporal bone -insertion: medial surface of mandible, intermediate tendon |
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Digastric Muscle - action
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-Suprahyoid Anterior muscle therefore it is required for raising the hyoid bone and support during swallowing
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Mylohoid -overview
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Anterior suprahyoid muscle
-insertion: hyoid bone -origin: mylohoid bone of the mandible |
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Mylohoid bone action
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Located in anterior suprahyoid
-therefore it raises hyoid bone -also, elevates tongue |
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Geniohyoid Muscle -action
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shortens the floor of the mouth and widens the pharynx during swallowing
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Stylohyoid Muscle overview
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Staying digging my Genny
-therefore located in the suprahyoid (anterior) -origin: styloid process of temporal bone -insertion: hyoid bone |
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Stylohyoid Muscle action
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elongates the floor of the mouth
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Two muscles that change the length of the floor of the mouth
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1) stylohid - elgonates floor of the mouth (increases length)
2)geniohyoid - shortens floor of mouth |
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Posterior Suprahyoid Muscle
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STAY DIGGING
Staylohoid, Diagastric Muscles |
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Infrahyoid Muscles
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located below the hyoid bone (inferior - below)
-4 muscles -makes up the words TOSS |
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Infrahyoid Muscles
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-MOST depress the hyoid bone (lowers the hyoid bone)
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Sternothyroid Muscle
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-located below (infra) to the hyoid bone
origin: sternum insertion: thyroid cartilage |
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Sternothyroid Muscle - ACTION
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DOES NOT DEPRESS THE HYOID BONE (only one that does not depress hyoid and is located below hyoid bone)
-depress the thyroid and larynx |
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Sternohyoid Muscle
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-infrahyoid (located below the hyoid bone)
origin: posterior and superior surfaces of sternum insertion: body of hyoid |
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Sternohyoid Muscle - action
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DEPRESSES the hyoid bone
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Omohyoid Bone - action
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DEPRESSES the hyoid bone and retracts hyoid when speaking
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Omohyoid Bone - overview
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infrahyoid (located below the hyoid bone -TOSS)
-origin: scapula and inferior belly -insertion: superior belly and body of hyoid |
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Thyrohyoid -overview
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-origin: thyroid cartilage
-insertion: body and greater hyoid |
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Thyrhoid -actoin
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DEPRESSES the hyoid bone
-raises thyroid and larynx |
