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51 terms

CH 4 Muscle System

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Epicranial Muscle
muscle of facial expression located in the scalp region with a frontal and occiptial belly
Obicularis Oculi Muscle
muscle of facial expression that encircles the eye; responsible for closing eyelid
Corrugator Supercilli Muscle
muscle of facial expression in the eye region, deep to the superior portion of the orbicularis oculi muscle
Buccinator Muscle
muscle of facial expression that forms the anterior portion of the cheek or the lateral wall of the oral cavity
Risorius Muscle
thin muscle of facial expression in the mouth region
Levator Labii Superioris Muscle
a broad, flat muscle of facial expression in the mouth region
Zygomaticus Major Muscle
muscle of facial expression in the mouth region partially responsible for smiling
Zygomaticus Minor Muscle
small muscle of facial expression in the mouth region, medial to the zygomaticus major muscle;
Levator Anguli Oris Muscle
facial expression muscle deep to both the zygomaticus major and minor muscles
Depressor Anguli Oris Muscle
triangular muscle of facial expression in the lower mouth region
Depressor Labii Inferioris Muscle
facial expression muscle deep to the depressor anguli oris muscle
Mentalis Muscle
short thick muscle of facial expression superior and medial to the mental nerve in the mouth region;
Platysma Muscle
muscle of facial expression that runs from the neck all the way to the mouth, covering the anterior cervical triangle;
Masseter Muscle
mastication muscle that is the broad, thick, rectangular muscle on each side of the face, anterior to the parotid salivary gland
Temporalis Muscle
broad, fan-shaped muscle of mastication on each side of the head that fills the temporal fossa, superior to the zygomatic arch.
Medial Pterygoid Muscle
the paired muscle of mastication, extending from medial pterygoid plate to the inside angle and ramus
Lateral Pterygoid Muscle
external pterygoid muscle with two separate heads of origin, lying within the infratemporal fossa, deep to the temporalis muscle
Hyoid Muscle
muscles that assist in the actions of mastication and swallowing lying superficial in neck tissues
Suprahyoid muscles
muscles located superior to the hyoid bone; digastric, mylohyoid, stylohyoid, and geniohyoid muscles
Digastric Muscle
suprahyoid muscle that has anterior and posterior bellies
Mylohyoid muscle
anterior suprahyoid muscle that is deep to the digastric muscle, with fibers running transversely between the two sides of the mandible
Stylohyoid muscle
thin posterior muscle, anterior and superficial to the posterior belly of the digastric muscle
Geniohyoid muscle
an anterior suprahyoid muscle that is deep to the mylohyoid muscle
Sternothryoid muscle
an infrahyoid muscle located superficial to the thyroid gland
Infrahyoid muscle
four pairs of hyoid muscles inferior tothe hyoid bone; include: sternohyoid, sternothyroid, thyrohyoid, and omohyoid muscles
Mastication Muscles
four pairs of muscles attached to the mandible that include the masseter, temporalis, medial pterygoid, and lateral pterygoid muscles
Omohyoid Muscle
an infrahyoid muscle lateral to both the sternothyroid and thyrohyoid muscles with superior and inferior bellies
Thyrohyoid Muscle
an infrahyoid muscle covered by the omohyoid and sternohyoid muscles
Median Septum
deep fibrous structure in the midline depression corresponds with the median lingual sulcus
Median Lingual Sulcus
midline depression on the tongue's dorsal surface
Intrinsic Tongue Muscles
muscles of tongue located enitrely inside the tongue, including the superior longitudinal, transverse, vertical and inferior longitudinal muscles
Extrinsic Tongue Muscles
tongue muscles with different origins outside the tone and have all their insertions inside the tongue, include the genioglossus, styloglossus, and hyoglossus muscles
Genioglossus muscle
fan-shaped extrinsic tongue muscle superior to the geniohyoid muscle separated by tongue's median septum
Styloglossus muscle
extrinsic tongue muscle that attaches to anterior aspect the styloid process and runs to the lateral aspect of the hyoglossus muscle
Hyoglossus muscle
extrinsic tongue muscle extending from hyoid bone up into the back of the tongue lateral to the genioglossus to pull the dorsum down
Palatoglossus muscle
soft palate muscle muscle that forms the anterior faucial pillar in oral cavity, a vertical fold anterior to eaqch palatine tonsil
Soft Palate
forms the nonbony posterior portion of the roof of the mouth or the oropharynx and connects laterally with the tongue
Palatopharyngeus Muscle
soft palate muscle that forms the posterior faucial pillar in the oral cavity, a vertical fold posterior to each palatine tonsil
Levator Veli Palatini Muscle
muscle mainly situated superior to the soft palate
Tensor Veli Palatini Muscle
special muscle that stiffens the soft palate responsible for opening the auditory tube to allow air to flow between the pharynx and middle ear cavity
Uvula Muscle
muscle of the soft palate located in the posterior region of the oral cavity
Sternocleidomastoid Muscle
one of the largest and most superficial cervical muscles that serves as primary muscular landmark of the neck during an extaroral examination; dividing neck into anterior and posterior cervical triangles
Trapezius Muscle
superficial cervical muscle covering the lateral and posterior surfaces of the neck
Levator labii superioris alaeque nasi muscle
a muscle of facial expression in the upper frontal process of the maxilla
Orbicular Oris Muscle
is an important muscle of facial expression in the mouth region, acting to shape and control the size of the mouth opening and important for creating the lip positions and movements during speech
Intrinsic Tongue Muscles (action)
tongue muscles that act to change shape of the tongue
Tongue Muscles (actions)
aids complex movements during mastication, speaking and swallowing; suspending and anchoring the tongue to the mandible, styloid process, and hyoid bone
Superior Longitudinal Tongue Muscle
intrinsic tongue muscle that is most superficial and on dorsal tongue surface
Transverse Tongue Muscle
intrinsic tongue muscle deep and superior to longitudinal tongue muscle
Inferior Longitudinal Tongue Muscle
intrinsic tongue muscle on ventral tongue surface
Pharynx Muscles
Stylopharyngeus, Pharyngeal constrictor and Soft palate