NB2 Exam Flashcards
Anterior belly digastric is innervated by the :
Mylohyoid nerve
Posterior belly Digastric is innervated by the :
Facial Nerve (CNVII)
Superior belly omohyoid is innervated by the :
Ansa cervicalis
The Sternocleidomastoid is innervated by the
Spinal accessory nerve (CNXI)
The Trapezius Muscle
Spinal accessory nerve (CNXI)
The Inferior belly omohyoid muscle is innervated by the :
Ansa cervicalis
The Pretracheal & Buccopharyngeal fascia is apart of which layer of Cervical fascia?
The Middle(Pretracheal) layer
Describe the Superficial Layer of the Cervical Fascia?
Loose, fatty subcutaneous layer which contains the platysma muscle.
Which nerve innervates the Platysma muscle?
CNVII-Facila Nerve
Where is the investing facia of the deep fascia located in the neck?
The Investing fascia surrounds the neck and is deep to the superficial fascia and embedded into the platysma muscle.
What are the 3 structures that describe the borders of the posterior triangle?
- Trapezius muscle, sternomastoid muscle and the clavicle
What are the 3 structures that describe the borders of the anterior triangle?
Midline, the sternomastoid muscle and mandible
The Lacrimal duct opens into which part of the lateral of the nasal cavity?
The Inferior Meatus
What is the purpose of the nasal concha on the lateral wall of the nasal cavity?
Increases the surface area to warm and humidify the inspired air.
At which cervical level does the Eustachian tube align with?
C1 and C2 evident by the presence of the Dens of C2 and C1 bones posterior to the Salphingopharyngeal fold.
Roof of the Nasal cavity consists of :
Nasal bone, Frontal bone & ethmoid bone
What bones make up the floor of the nasal cavity?
Maxilla and palatine
What are the bones and tissue that make up the Lateral wall of the nasal cavity?
Maxilla, Nasal lacrimal, ethmoid, palatine bones and the inferior concha
The Medial Wall of the Nasal cavity is made up of:
The ethmoid bone, vomer, the nasal, sphenoid, palatine, maxilla bones and the nasal septum.
Where do receptor neurons in the olfactory mucosa send their axons?
The axons in the olfactory nerve are sent to the olfactory bulb.
What are the sensory innervations of the lateral wall?
CN V1- Ophthalmic branch and CN V2- Maxillary branch.
What are the 7 components that make up the medial wall of the Nasal Septum?
Septal cartilage, vomer, ethmoid, sphenoid, maxillary, frontal, nasal
What arteries provide vascular supply to the nasal cavity?
ICA and ECA
Most common site for nosebleeds
Kiesselbach’s area
Which 4 arteries anastomose in Kiesselbach’s area?
Ant. ethmoidal artery(septal branch), Superior labial artery(septal branch), greater palatine artery(terminal branch) and the sphenopalatine artery(posterior septal branch)
Lateral Boundary of the IT Fossa:
The Ramus of the mandible
Medial Boundary of the IT Fossa:
The Lateral pterygoid plate
Anterior Boundary of the IT Fossa:
The posterior aspect of the maxilla
Posterior Boundary of the IT Fossa:
The tympanic plate and the mastoid and styloid processes of the temporal bone
Superior Boundary of the IT Fossa:
The inferior (infratemporal) surface of the greater wing of the sphenoid
Inferior Boundary of the IT Fossa:
Where the medial pterygoid muscle(a muscle of mastication) attaches to the mandible near its angle
What 6 components are within the IT Fossa?
- Inferior part of the temporalis muscle
- Lateral & Medial pterygoid muscles
- Maxillary Artery
- Pterygoid venous plexus
- Mandibular, inferior alveolar, lingual, buccal, and chorda tympani nerves
- otic ganglion
What are the 2 extrinsic ligmanets along with the lateral ligament connect the mandible to the cranium?
The Stylomandibular ligament and the Sphenomandibular ligament
What disorder does this describe? The condyle of the mandible being abnormally displaced, with a loss of the normal articulation with the glenoid fossa
Bilateral anterior dislocation of the TMJ
The pterygoid plexus’ communication with what structures makes it a clinically significant plexus?
The pterygoid plexus communicates with the cavernous sinus, the inferior ophthalmic vein and the facial vein.
Veins that connect the pterygoid plexus with the cavernous sinus:
Emissary veins
A small _________ _______ opens onto the posterior wall and leads to the nasopharynx
Palatovaginal canal
