Control L2 the Skull Flashcards
How many bones are there in the skull?
22
What connects all but 1 bone in the skull?
Fibrous sutures
What bone is not connected by fibrous sutures?
Mandible with temporal bone at temporomandibular joint
What bone overlies the frontal lobe anteriorly?
Frontal bone
What are the 12 different bones of the skull seen from a frontal view?
- Frontal
- Parietal
- Temporal
- Sphenoid
- Ethmoid
- Lacrimal
- Zygomatic
- Maxilla
- Nasal
- Vomer
- Inferior nasal concha
- Mandible
What bones seen from the frontal view of the skull are singular instead of paired? (5 out of 12)
- Frontal bone
- Sphenoid bone
- Ethmoid bone
- Vomer bone
- Mandible
What suture connects the frontal bone to the parietal bones?
Coronal suture
What suture connects the two parietal bones?
the sagittal suture
What bones make up the orbital cavity?
Posterior/ventral = sphenoid bone
Superior/dorsal = frontal bone
Lateral = zygomatic bones
Medial = ethmoid, lacrimal and maxilla bones
What bones are found in the nasal cavity?
Ethmoid bone, vomer bone and the inferior nasal concha bones.
Which bones of the skull have paired paranasal sinuses? (4)
- Frontal bone
- Ethmoid bone
- Sphenoid bone
- Maxillary bones
What is the role of the paranasal sinuses?
- Lighten the weight of the skull
- Filter and humidify air
- Resonate voice
- Drain liquid into meatuses
Which concha are formed by the ethmoid bone?
Superior and middle concha
What bone forms the inferior concha?
Vomer bone
Which paranasal sinuses drain into the superior meatus?
Sphenoid and ethmoid
Which paranasal sinuses drain into the middle meatus?
Maxillary and frontal
What is the inferior meatus also known as? What does it drain?
Nasal lacrimal duct - brings tears from when we cry into the nasal cavity.
Which bone does the pituitary gland sit on?
Sphenoid bone
What is the posterior projection on the temporal bone called?
The mastoid process
What is the name of the pointy projection of the temporal bone (anterior to the mastoid process)?
The styloid process
What is the hole in the temporal bone called?
External acoustic/auditory canal or also called external auditory meatus
What bone connects the middle ear and external ear?
Temporal bone via the external acoustic canal
What membrane covers the external acoustic canal? What is it better known as?
A tympanic membrane also called the ear drum
What is the name of the process on the temporal bone that connects to the zygomatic bone?
The zygomatic process of the temporal bone
What muscles attaches onto the zygomatic process of the temporal bone?
The masseter muscles
What areas of the temporal bone are important sites of muscle attachment?
The styloid process, the mastoid process and the zygomatic process.