1.1 The Bony Skull - General Features Flashcards
What is the most common type of joint seen between most bones in the skull?
Fibrous suture joint
What 3 parts are the skull divided into?
- Neuro-cranium
- Facial skull (viscera-cranium)
- Mandible
What is the structure of a skull bone from exterior to interior?
Compact cortical bone -> spongey trabecular bone -> compact cortical bone
What part of the skull houses bone marrow?
Spongey
Name the bones of the skull
Cranium: - Parietal - Occipital - Temporal Facial skeleton: - Frontal - Zygomatic - Maxilla - Mandible - Ethmoid - Lacrimal - Vomer - Nasal
What is the name of the suture between the 2 parietal bones?
Sagittal suture
What is the name of the suture between the frontal and parietal bones?
Coronal suture
What is the name of the suture between the parietal bone and occipital bone?
Lambdoid suture
What is the name of the suture between the parietal and temporal bone?
Squamous suture
What do the bones of the facial skeleton give attachment to?
Muscles of the tongue
Muscles of mastication
Muscles of the pharynx
What bone is the occipital protuberance a part of?
Occipital bone
What bone is the mastoid process a part of?
Temporal bone
What bones are the zygomatic arch a part of?
Temporal (zygomatic process) and zygomatic (temporal process) bones
What bone is the styloid process a part of?
Temporal bone
What bone are the occipital condyles part of?
Occipital
What are the 3 cranial fossae of the skull floor?
- Anterior cranial fossa
- Middle cranial fossa
- Posterior cranial fossa
Name the parts of the sphenoid bone?
- body
- greater wing
- lesser wing
- pituitary fossa
- pterygoid plates
Which parts of the sphenoid bone are easily seen in a transverse slide?
- greater wing
- lesser wing
- pituitary fossa
Which part of the sphenoid bone is most clearly seen in a coronal slide?
body
Which part of the sphenoid bone are seen on the inferior aspect of the skull floor?
pterygoid plates
What is the largest foramen of the skull, seen in the posterior cranial fossa?
Foramen magnum
Name 2 structures which pass through the foramen magnum?
- Spinal accessory nerve
2. Right & left vertebral arteries
What are orbits?
Sockets for the eyeball
What are air sinuses/sacs?
Air spaces present within some skull bones which play a role in decreasing the weight of the skull
