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Test Block #2
Innervations, origins, insertions, and actions. Also, random notes.
138
Anatomy
Undergraduate 4
06/18/2011

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Cards

Term
What is the innervation of the Masseter?
Definition

Masseteric n.

(CN V3)

Term
What is the origin of the Masseter?
Definition
Zygomatic Arch
Term
What is the insertion of the Masseter?
Definition
Lateral Angle of the Mandible
Term
What is the action of the Masseter?
Definition
Elevate Mandible
Term
What is the innervation of the Medial Pterygoid?
Definition

Pterygoid n.

(CN V3)

Term
What is the origin of the Medial Pterygoid?
Definition

Deep Head:  Medial Side of Lateral Pterygoid Plate

Superficial Head:  Tuberosity & Pyramidal Process of the Maxilla

Term
What is the insertion of the Medial Pterygoid?
Definition
Medial Angle of the Mandible
Term
What is the action of the Medial Pterygoid?
Definition
Elevate and Laterally Move the Mandible
Term
What is the innervation of the Orbicularis Oculi?
Definition
CN VII
Term
What is the origin of the of the Orbicularis Oculi?
Definition
Nasal Process of Frontal Bone, Palpebral Ligament & Lacrimal Crest of Lacrimal Bone
Term
What is the insertion of the Orbicularis Oculi?
Definition
Skin & Fascia Surrond the Orbit
Term
What is the action of the Orbicularis Oculi?
Definition
Closes the Eye
Term
What is the innervation of the Occipitofrontalis?
Definition
CN VII
Term
What is the origin of the Occipitofrontalis?
Definition
Epicranial Aponeurosis
Term
What is the insertion of the Occipitofrontalis?
Definition
Skin of Forehead & Neck
Term
What is the action of the Occipitofrontalis?
Definition
Moves the Scalp
Term
What is the innervation of the Orbicularis Oris?
Definition
CN VII
Term
What is the origin of the Orbicularis Oris?
Definition
Skin and Fascia Surrounding the Lips
Term
What is the insertion of the Orbicularis Oris?
Definition
Skin and Fascia of Lips
Term
What is the action of of the Orbicularis Oris?
Definition
Purses the Lips
Term
What is the innervation of the Zygomaticus Major?
Definition
CN VII
Term
What is the origin of the Zygomaticus Major?
Definition
Zygomatic Bone
Term
What is the insertion of the Zygomaticus Major?
Definition
Skin of the Angle of the Mouth
Term
What is the action of the Zygomaticus Major?
Definition
Elevates and Draws the Corner of the Mouth Laterally
Term
What is the innervation of the Buccinator?
Definition
CN VII
Term
What is the origin of the Buccinator?
Definition
Pterygomandibular Raphe, Mandible & Maxilla
Term
What is the insertion of the Buccinator?
Definition
Angle of the Mouth & Lateral Portion of Upper & Lower Lips
Term
What is the action of the Buccinator?
Definition

Pulls the Corner of the Mouth Laterally

Compresses the Cheek Against the Teeth

Term
What is the innervation of the Platysma?
Definition
CN VII
Term
What is the origin of the Platysma?
Definition
Fascia Overlying Pectoralis Major and Deltoid mm.
Term
What is the insertion of the Platysma?
Definition
Inferior Border of Mandible
Term
What is the action of the Platysma?
Definition
Draws the Corners of the Mouth Down
Term
What is the innervation of the Sternocleidomastiod?
Definition
CN XI
Term
What is the origin of the Sternocleidomastiod?
Definition
Manubrium of the Sternum and Medial one-third of the Clavicle
Term
What is the insertion of the Sternocleidomastiod?
Definition
Mastoid Process of the Temporal Bone
Term
What is the action of the Sternocleidomastiod?
Definition

Rotates the Head to Side Opposite Contraction

Laterally Flexes the Next to the Contracted Side

Bilaterally Flexes the Neck

Term
What is the innervation of the Anterior Belly of the Digastricus?
Definition
Mylohyoid n.
Term
What is the origin of the Anterior Belly of the Digastricus?
Definition
Digastric Fossa of Mandible
Term
What is the insertion of the Anterior Belly of the Digastricus?
Definition
Digastric Tendon
Term
What is the action of the Anterior Belly of the Digastricus?
Definition
Lowers mandible or Raises Hyoid
Term
What is the innervation of the Posterior Belly of the Digastricus?
Definition
CN VII
Term
What is the origin of the Posterior Belly of the Digastricus?
Definition
Mastoid Process
Term
What is the insertion of the Posterior Belly of the Digastricus?
Definition
Digastric Tendon
Term
What is the action of the Posterior Belly of the Digastricus?
Definition
Elevate and Retract Hyoid
Term
What is the innervation of the Anterior Scalene?
Definition

Ventral Rami

C3-C6

Term
What is the origin of the Anterior Scalene?
Definition
Transverse Processes of C3-C6
Term
What is the insertion of the Anterior Scalene?
Definition
1st Rib
Term
What is the action of the Anterior Scalene?
Definition
Elevates the 1st Rib, Laterally Bends the Neck
Term
What is the innervation of the Middle Scalene?
Definition
Ventral Rami, C3-C8
Term
What is the origin of the Middle Scalene?
Definition
Transverse Processes of C2-C7
Term
What is insertion of the Middle Scalene?
Definition
1st Rib
Term
What is the action of the Middle Scalene?
Definition
Elevates the 1st Rib, Laterally Bends the Neck
Term
What is the innervation of the Trapezius?
Definition

Subtrapezial Nerve Plexus

(CN X12 and C3 and C4 Ventral Rami)

Term
What is the origin of the Trapezius?
Definition
External Occipital Protuberance of the Skull, C1-T12 Spinous Processes
Term
What is the insertion of the Trapezius?
Definition

Clavicle (upper)

Acromion (middle)

Scapular (lower)

Term
What is the action of the Trapezius?
Definition
Elevates and Depresses the Scapula, Rotates the Scapula Superiorly, Retracts Scapula
Term
What is the innervation of the Levator Scapulae?
Definition
Dorsal Scapular n.
Term
What is the origin of the Levator Scapulae?
Definition
C1-C4 Transverse Processes
Term
What is the insertion of the Levator Scapulae?
Definition
Medial Border of Scapula, Above Spine
Term
What is the action of the Levator Scapulae?
Definition
Elevates the Scapulae
Term
What is the innervation of the Omohyoid?
Definition
C1-C3 via Ansa Cervicalis
Term
What is the origin of the Omohyoid?
Definition
Medial Margin of the Suprascapular Notch
Term
What is the insertion of the Omohyoid?
Definition
Hyoid Bone
Term
What is the action of the Omohyoid?
Definition
Depresses and Fixes Hyoid
Term
What is the innervation of the Sternohyoid?
Definition
C1-C3 via Ansa Cervicalis
Term
What is the origin of the Sternohyoid?
Definition
Manubrium of the Sternum
Term
What is the insertion of the Sternohyoid?
Definition
Hyoid Bone
Term
What is the action of the Sternohyoid?
Definition
Depresses Hyoid
Term
What is the innervation of the Sternothyroid?
Definition
C1-C3 via Ansa Cervicalis
Term
What is the origin of the Sternothyroid?
Definition
Manubrium of the Sternum
Term
What is the insertion of the Sternothyroid?
Definition
Oblique Line of the Thyroid Cartilage
Term
What is the action of the Sternothyroid?
Definition
Depresses the Larynx
Term
What is the innervation of the Thyrohyoid?
Definition
C1 branch traveling with CN XII
Term
What is the origin of the Thyrohyoid?
Definition
Oblique Line of the Thyroid Cartilage
Term
What is the insertion of the Thyrohyoid?
Definition
Hyoid Bone
Term
What is the action of the Thyrohyoid?
Definition
Depress Hyoid or Raise Larynx
Term
What is the innervation of the Mylohyoid?
Definition
Mylohyoid n.
Term
What is the origin of the Mylohyoid?
Definition
Mylohyoid Line of Mandible
Term
What is the insertion of the Mylohyoid?
Definition
Hyoid Bone and Mylohyoid Raphe
Term
What is the action of the Mylohyoid?
Definition
Support and Elevate the Floor of the Mouth, Raise Hyoid
Term
What is the innervation of the Cricothyroid?
Definition
External Branch of Superior Laryngeal n.
Term
What is the origin of the Cricothyroid?
Definition
Anterior and Lateral Aspects of Arch of the Cricoid Cartilage
Term
What is the insertion of the Cricothyroid?
Definition
Inferior Margin and Inferior Horn of Thyroid Cartilage
Term
What is the action of the Cricothyroid?
Definition
Stretches the Vocal Fold
Term
What is the innervation of the Posterior Cricoarytenoid?
Definition
Inferior Laryngeal n.
Term
What is the origin of the Posterior Cricoarytenoid?
Definition
Posterior Surface of Lamina of the Cricoid Cartilage
Term
What is the insertion of the Posterior Cricoarytenoid?
Definition
Muscular Process of the Arytenoid Cartilage
Term
What is the action of the Posterior Cricoarytenoid?
Definition
Abducts the Vocal Fold
Term
What is the innervation of the Transverse Arytenoid?
Definition
Inferior Laryngeal n.
Term
What is the origin of the Transverse Arytenoid?
Definition
Apex and Body of Arytenoid Cartilage
Term
What is the insertion of the Transverse Arytenoid?
Definition
Apex and Body of Contralateral Arytenoid Cartilage
Term
What is the action of the Transverse Arytenoid?
Definition
Adducts the Vocal Fold
Term
What is the innervation of the Thyroarytenoid?
Definition
Inferior Laryngeal n.
Term
What is the origin of the Thyroarytenoid?
Definition
Posterior Surface of the Thyroid Cartilage at the Midline Angle
Term
What is the insertion of the Thyroarytenoid?
Definition
Anterolateral Border of Arytenoid
Term
What is the action of the Thyroarytenoid?
Definition
Relaxes Vocal Fold
Term
What is the innervation of the Superior Constrictor?
Definition

CN X

Pharyngeal Branches

Term
What is the origin of the Superior Constrictor?
Definition
Lower Posterior Border of Medial Pterygoid Plate, Hamulus, Mylohyoid Line of Mandible and Intervening Pterygomandibular Raphe, Lateral Tongue
Term
What is the insertion of the Superior Constrictor?
Definition
Pharyngeal Raphe
Term
What is the action of the Superior Constrictor?
Definition
Constrict Pharynx
Term
What is the innervation of the Stylopharyngeus?
Definition
CN IX Pharyngeal Branches
Term
What is the origin of the Stylopharyngeus?
Definition
Styloid Process
Term
What is the insertion of the Stylopharyngeus?
Definition
Superior Border & Superior Horn of Thyroid, Lateral Pharyngeal Wall
Term
What is the action of the Stylopharyngeus?
Definition
Elevate Pharynx
Term

What are dermatomes?

Definition
Cutaneous innervation of the face by the Trigeminal (CN V) and spinal nerves.
Term
What is the Pterion?
Definition
Junction of the skull between frontal, parietal, temporal and sphenoid bones.  
Term
What is the bregma?
Definition
Joining together of the frontal and both parietal bones on the skull. (in infants, the anterior fontanelle)
Term
What is the lambda?
Definition
Joining together of the occipital and both parietal bones in the skull.  (in infants, the posterior fontanelle)
Term
What are some possible causes of hydrocephalus?
Definition

Overproduction of CSF

Obstruction of CSF flow

Interference with CSF absorption

Term
What layers make up the scalp?
Definition

Skin

Connective tissue (Lots of blood vessels)

Aponeurosis (Epicranial)

Loose connective tissue

Pericranium

Term
Which layer of the scalp has a richly dense vascularized subcutaneous layer?
Definition
Connective Tissue Layer - #2
Term
What makes the connective tissue layer more prone to excessive bleeding?
Definition
The arterial walls in this layer are firmly attached to the connective tissue limiting their ability to constrict when cut and therefore can cause profuse bleeding.
Term

What are the muscles of facial expression?

(for this course)

Definition

Frontalis

Orbicularis oculi

Zygomaticus major

Orbicularis oris

Buccinator

Playtsma

Term
What is another name for CN V?
Definition
Trigeminal nerve
Term
What are the three divisions of the trigeminal (CN V)?
Definition

V1 - Ophthalmic division

V2 - Maxillary division

V3 - Mandibular division

Term
What are the branches of the ophthalmic division of the trigeminal nerve?
Definition

Supraorbital nerve

Supratrochlear nerve

Infratrochlear nerve

Term
What are the branches of the maxillary division of the trigeminal nerve?
Definition

Infraorbital nerve

Zygomaticalfacial nerve

Zygomaticaltemporal nerve

 

Term
What are the branches of the mandibular division of the trigeminal nerve?
Definition

Buccal nerve

Mental nerve

Auriculotemporal nerve

Term
What facial nerve exits the cranium via the stylomastoid foramen?
Definition
Facial nerve (CN VII)
Term
What nerves originate in the parotid plexus fo the facial nerve?
Definition

Temporal

Zygomatic

Buccal

Marginal mandibular

Cervical 

 

(remember the hand on the face)

Term
What kind of secretion does the parotid gland provide?
Definition
Serous
Term

What kind of secretion does the submandibular gland provide?

Definition
Serous and mucous
Term

 

What kind of secretion does the sublingual gland provide?

 

Definition
Mucous
Term
What arteries supply the parotid gland?
Definition
External carotid and superficial temporal arteries
Term
What vein drains the parotid gland?
Definition
Retromandibular vein
Term
What innervates the parotid gland?
Definition
CN IX parasympathetic via auriculotemporal nerve (branch of CN V3)
Term
The submandibular duct runs with what nerve?
Definition
Lingual nerve
Term
What are the muscles of mastication?
Definition

Temporalis muscle

Masseter muscle

Medial Pterygoid muscle

Lateral Pterygoid muscle

Buccinator

Term
Bell's Palsy is an actue, unlateral facial palsy due to injury to which nerve?
Definition
CN VII
Term
What may be the result of trauma to the region of the temple called the pterion?
Definition
Rupture of the anterior division of the middle meningeal artery - causing extradural bleed, lucid interval, coma, and death, unless rapidly treated.
Term
What are the posterior openings of the nasal cavity called?
Definition
Choanae
Term
What is the smallest concha of the nose, which protects the olfactory bulb?
Definition
Superior concha
Term
What is the more intermediate sized concha of the sinus, located on the ethmoid bone?
Definition
Middle concha
Term
What is the largest of the sinus concha?
Definition
Inferior concha
Term
Where does the frontal sinus drain?
Definition
Hiatus semilunaris
Term
Where does the sphenoid sinus drain?
Definition
Onto the sphenoethmoidal recess above the superior concha.
Term
Where does the maxillary sinus drain?
Definition
Into the nasal cavity via the hiatus semilunaris
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