Lab 2 - Head & Neck Questions Flashcards
Identify the following bones that make up the face (viscerocranium).
- maxilla
- palatine
- zygomatic
- lacrimal
- nasal
- vomer
- inferior nasal concha
- mandible
Identify the following bones that make up the face (viscerocranium).
- maxilla
- palatine
- zygomatic
- lacrimal
- nasal
- vomer
- inferior nasal concha
- mandible
Which of these bones are paired?
6 Paired bones (n=12)
1. Nasal
2. Zygomatic
3. Lacrimal
4. Maxilla
5. Inferior conchae
6. Palatine
Identify the following paranasal sinuses:
- frontal sinus
- maxillary sinus
- sphenoid sinus
What part of the mandible forms the temporomandibular joint and what part of the skull does it articulate with?
mandibular fossa of the temporal bone come together to make the TMJ
Identify the following muscles of facial expression.
orbicularis oculi
closes the eyelids (protection, moistens eyes by spreading tears)
Identify the following muscles of facial expression.
orbicularis oris
closes oral fissure (compresses & protrudes lips (kissing), resists distention (when blowing))
Identify the following muscles of facial expression.
buccinator
compresses checks against teeth, works with tongue to keep food out of oral vestibule, resists distention when blowing; suckling
Identify the following muscles of facial expression.
frontalis
elevates eyebrows & wrinkles skin on forehead; protrudes scalp, expression: surprise/curiosity
What nerve innervates each of the muscles of facial expression?
ALL innervated by the Facial Nerve (CN VII) (exits via the STYLOMASTOID FORAMEN)
Identify the muscles of mastication.
temporalis
CLOSE mouth + REtrusion
Identify the muscles of mastication.
masseter
CLOSE mouth + PROtrusion
Identify the muscles of mastication.
lateral pterygoid
OPEN mouth + PROtrusion
Identify the muscles of mastication.
medial pterygoid
CLOSE mouth + PROtrusion
What nerve innervates the muscles of mastication?
ALL innervated by the MANDIBULAR BRANCH (CN V3) of the TRIGEMINAL NERVE
What structure passes through the stylomastoid foramen?
All innervated by the FACIAL NERVE (CN VII) (exits via the STYLOMASTOID FORAMEN)
How is sound transmitted from the external ear to the inner ear?
External Ear directs sounds down into the ear, vibrates with sound wave & transmits vibrations to ossicles in middle ear, pharyngotympanic tube connects the tympanic cavity with the nasopharynx
What is the function of the vestibular system?
Semilunar Canals – detects rotational movements of the head
Vestibule (Saccule and Utricle) – detects LINEAR ACCELERATIONS/DECCELERATION of the head (forward/backward & up/down)
What nerve innervates the vestibular system?
Both send information to the brain via the VESTIBULAR DIVISION of CN VIII ?
Identify the orbit and the following openings:
- optic canal
- superior orbital fissure
What structures pass through these openings?
optic canal – CN II, Ophthalmic A
superior orbital fissure – CN III, CN IV, CN V1, & CN VI, Superior & Inferior ophthalmic veins
Superior rectus
Innervation: Oculomotor N. (CN III), Primary Action: Elevates eye, Secondary Actions: Adducts & Intorts eye
Inferior rectus
Innervation: Oculomotor N. (CN III), Primary Action: Depresses eye, Secondary Actions: Adducts & Extorts eye
Superior oblique
Innervation: Trochlear N. (CN IV), Primary Action: Intorts eye, Secondary Actions: Abducts & depresses eye
Inferior oblique
Innervation: Oculomotor N. (CN III), Primary Action: Extorts eye, Secondary Action: abducts & elevates eye
Medial rectus
Innervation: Oculomotor N. (CN III), Action: Adducts eye
