Head and Neck mm. OIA and Innervation Flashcards
Occipitofrontalis m. (both bellies)
Frontal Belly:
Origin: epicranial aponeurosis
Insertion: Skin of forehead/eyelids (NOT bone)
Action: Elevates eyebrows, wrinkles forehead.
Nerve: Facial Nerve (CN VII)
Occipital Belly: Origin- Occipital bone, part of temporal bone Insertion: Epicranial aponeurosis Action: smoothes out forehead Nerve: Facial Nerve (CN VII)
Stylohyoid m
O: styloid process of temporal bone
I: hyoid
A: Pulls hyoid superiorly and posteriorly.
Nerve: Facial n. CNVII
Platysmus action and innervation?
A: Draws skin of neck superiorly, widens mouth and drops corners inferiorly
Nerve: cervical branch of facial n
Digastric m
O: digastric fossa of mandible I: mastoid process A: Lowers mandible or raises hyoid (swallowing) Innervation: anterior belly- v3 of CNV posterior belly- CNVII
mylohyoid m.
O: mylohyoid line of mandible
I: midline raphe and hyoid bone
A: supports/elevates floor of mouth, elevates hyoid during swallowing
Innervaton: v3 of CNV
Geniohyoid m.
O: inferior mental spine
I: hyoid
A: raises hyoid bone in swallowing and elevates floor of mouth and tongue.
Innervation: C1 fibers via hypoglossal n.
Sternohyoid m.
O: sternoclavicular joint and manubrium
I: hyoid
A: depresses hyoid during swallowing
Innervation: ansa cervicalis
omohyoid m.
O/I: inferior belly- scapula
superior belly- hyoid
A: depresses larynx and hyoid, also pulls hyoid posteriorly/laterally
Innervation: ansa cervicalis
Thyrohyoid m.
O: thyroid cartilage
I: hyoid
A: depresses hyoid, or raises larynx
N: C1
Sternothyroid m.
O: manubrium
I: thyroid cartilage
A: moves larynx downward
N: ansa cervicalis
Palatoglossus m. (include sensory innervation)
A: moves soft palate toward tongue.
N: Vagus n. via pharyngeal plexus
sensory: V2 and CN IX- glossopharyngeal
palatopharyngeus muscle (include sensory)
A: tenses soft palate during swallowing
N: vagus n.
Sensory: V2 and CN IX- glossopharyngeal
Levator palatini m. (include sensory)
O: cartilage of auditory tube I: Soft palate A: elevates soft palate during swallowing N: vagus n. via pharyngeal plexus Sensory: V2 and CN IX- glossopharyngeal
Tensor palatini (include sensory)
Attachments: Scaphoid fossa (b/w pterygoid plates), hamulus (on medial pterygoid plate), torus auditory tube
A: opens auditory tube during swallowing
N: CNV3
Sensory: V2 and CN IX- glossopharyngeal
Musculus uvulae
A: closes aperture b/w oral and nasal during swallowing
N: vagus n. via pharyngeal plexus
Sensory: V2 and CN IX- glossopharyngeal
All palate muscles except one are innervated by what nerve? What is the exception?
Vagus n. via pharyngeal plexus. The exception is the tensor palatini.
genioglossus m innervation
CN XII hypoglossal
hyoglossus m innervation
CN XII hypoglossal
styloglossus m innervation
CN XII hypoglossal
All extrinsic glossal muscles except one are innervated by?
CN XII hypoglossal. Exception is the palatoglossus m, which is innervated by the Vagus n. via the pharyngeal plexus.
All intrinsic tongue muscles are innervated by?
CN XII hypoglossal
Stylopharyngeus m. innervation
CN IX glossopharyngeal
Connection between otitis media and breast feeding?
More effort required when breast feeding, so the tensor palatini gets strong and opens the auditory tube. this cleans it out protecting it from infection.
What is the only soft palate muscle that is part of the oropharynx?
The palatopharyngeus m
taste and sensation from most of posterior 1/3 tongue?
CN IX glossopharyngeal.
What cranial nerve is deep to the palatine tonsilar bed? It goes to tongue..
CN IX glossopharyngeal. Often gets confused with XII.
What artery is behind the palatine tonsil?
The tonsilar br. of the facial a.
the laryngopharynx extends from?
behind larynx, from the epiglottis to the esophagus.
middle pharyngeal constrictor does what?
closes off hyoid
superior pharyngeal constrictor does what?
closes off mandible
inferior pharyngeal constrictor does what?
closes off thyroid cartilage.
Where exactly is the superior cervical ganglion? Behind what?
behind superior pharyngeal constrictor m, in the retropharyngeal space. Also behind carotid sheath.
cricothyroid action?
Rocks thyroid cartiage forward, raising pitch
