Flashcards in OPT1210 Exam 2 Deck (222)
How many bones are in the human skull?
How is the infant skull different from the adult skull?
Infant skull has 4 fontanels (2 fontanels: anterior, posterior and 2 sutures: sphenoid, mastoid)
and fibrous membrane that holds bones together and
Allows movement of bones during birth and growth of brain
The bones of the skull are joined by what?
What is the skullcap called?
What bones support teeth and form nasal cavity and orbit?
What does suture mean?
To join together
What are the 4 major sutures in the skull?
Coronal, Sagittal, Lamboidal, Squamous
What are the major skull cavities?
There are 4: Cranial, Orbital, Nasal, Buccal
What are the parts of the cranial fossa?
Anterior (Frontal lobe)
Middle (Temporal lobe)
Posterior (Cerebellum and Occipital lobes)
What are the Cranial bones?
There are 14:
Occipital (primary visual cortex)
Maxillary (single bone...not paired)
Which of the Cranial bones protect the eye?
There are 7:
Squamous Zygomatic Arch
Mandibular Fossa TMJ
External Auditory Meatus
Which bone houses the largest opening in the skull and what is it?
The occipital bone
It's the Foramen Magnum (spinal cord)
Which cranial bone conducts the 7th cranial facial nerve?
Which bone is bat shaped?
What is the thinnest bone in the body?
Ethmoid bone (aka paper bone)
What are the 6 paired facial bones?
Inferior Nasal Concha
What are the palatine bones?
Make up the posterior 1/3 of hard palate
Lateral nasal wall
What are the zygomatic bones?
Include the zygomatic arch
Zygomatic fracture is the most common fracture of the skull
What is the smallest bone of the orbit?
What are the bones of the orbit?
There are 7:
Frontal (roof of orbit)
Maxillary (floor of orbit)
What are the 4 sinuses?
What do the 4 paranasal sinuses do?
Lighten weight of skull
What are the 3 unpaired facial bones?
Vomer (vertical bone)
Mandible (freely movable)
Hyoid (free floating...muscles that let you swallow)
How many pairs of mimetic muscles of facial expression are there?
What are the muscles of facial expression?
Levator Anguli Oris
Levator Labii Superioris
Levator Labii Superioris Alaeque Nasi
What nerve controls muscles of facial expression?
7th cranial nerve - facial
What is 7th nerve paralysis?
How many wings of the sphenoid bone are there? What are they?
There are 2:
What is the brain's most important receptor?