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34 Cards in this Set
- Front
- Back
What are the two major divisions of the skull?
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Neurocranium and splanchnocranium
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Name the bones that comprise the brain case. Which of these bones are unpaired?
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Occipital bone (unpaired)
Parietal bone Frontal bone Sphenoid bone (unpaired) Temporal bone Ethmoid bone (unpaired) |
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Name the facial bones of the skull.
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Incisive bone
Nasal bone Maxillary bone Palatine bone Vomer bone Pterygoid bone Nasal conchae Zygomatic bone Lacrymal bone |
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Identify:
1, 2, 3, 4 |
1. Nasal bone
2. Incisive bone 3. Maxillary bone 4. Lacrimal bone |
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Identify:
10, 11, 13, and 15 |
10. Zygomatic bone
11. Palatine bone 13. Pterygoid bone 15. Vomer bone |
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Identify:
6, 7, and 8 Which are unpaired? |
6. Frontal bone
7. Parietal bone 8. Occipital bone (unpaired) |
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Identify:
9, 12, and 14 (not 12' or 14') Which are unpaired? |
9. Temporal bone
12. Presphenoid bone 14. Basisphenoid bone |
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Describe the skull shape of the following breeds:
Greyhound Golden Retriever English Bulldog |
Dolichocephalic
Mesaticephalic Brachycephalic |
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Identify A - E
Which structure should be readily palpable? |
A. Interparietal bone
B. External occipital protuberance (readily palpable) C. Paracondylar (Jugular) process D. Occipital condyle E. Foramen magnum |
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Identify A - D
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A. Nucchal crest
B. Supraoccipital bone C. Exoccipital bone D. Basioccipital bone |
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What muscle inserts on the basioccipital region of the occipital bone?
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Longus capitis m.
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What courses through the foramen magnum?
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Spinal cord
Accessory n. Basilar a. |
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What muscle originates on the jugular process of the occipital bone? What is its function?
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Digastricus m.
Opens jaw. |
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Which bones fuse to form the occipital bone?
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Basioccipital, exoccipital, and supraoccipital bones
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T or F:
The interparietal bone fuses with the occipital bone prenatally to form the external sagittal crest. |
False, fool, but close...
While the interparietal bone does fuse with the occipital bone prenatally, the sagittal crest is made up of parts of the parietal and interparietal bones. |
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Identify A - D
ID the circled area. What muscle originates here and what is its function? |
A. Optic canal
B. Orbital fissure C. Rostral alar foramen D. Caudal alar foramen Temporalis m. originates from the temporal fossa. Function - close jaw. |
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What bony structure divides the cerebrum from cerebellum? Which bone or bones is this structure formed by?
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Tentorium osseum is formed by parietal and occipital bones
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What are the three parts of the temporal bone? Which houses the inner ear? Which is the strongest?
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Squamous, petrous, and tympanic portions.
Petrous houses inner ear AND is the strongest. |
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Identify these parts of the temporal bone.
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A. Zygomatic process
B. Mandibular fossa C. Retroarticular process D. Squamous part of temporal bone. |
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Identify these parts of the temporal bone. What muscle or muscles attach at C?
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A. Tympanic bulla
B. External acoustic meatus C. Mastoid process Cleidomastoideus and sternomastoideus mm. insert here. |
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Which processes serve as attachment points for the orbital ligament?
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Zygomatic process of the frontal bone and the frontal process of the zygomatic bone.
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What bone or bones form the zygomatic arch? What muscle or muscles originate here?
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Temporal process of the zygomatic bone, zygomatic process of the temporal bone
Masseter m. origin. |
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Which bones form the orbital margin?
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Frontal, zygomatic, and lacrimal bones.
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Identify A and B. What canal is formed by these? What courses through this canal?
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A. Infraorbital foramen
B. Maxillary foramen A + B = infraorbital canal infraorbital a. and n. course through here |
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T or F:
The maxillary bone contains alveoli for all upper teeth in sheep. |
I'll bet you said false and, if I was talking about dogs, you'd be right! Sheep have no upper incisors and thus no alveolar sockets! In dogs, the upper incisors are within the incisive bone.
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Which bones form the hard palate?
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Maxillary bone (palatine processes)
Incisive bone Palatine bone |
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Which bone(s) form the nasal aperture?
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Incisive and nasal bones
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What are the parts of the sphenoid bone? Which foramena are found in each region?
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Presphenoid bone:
Optic canal Basisphenoid bone: Oval foramen, round foramen, alar canal |
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What structure does the pituitary "sit" in?
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Hypophyseal fossa right near the turkish saddle (sella turcica)
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What portion of the ethmoid bone contributes to the bony nasal septum?
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Perpendicular plate
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Which bone separates the cranial and facial regions of the skull?
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Ethmoid bone
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Which bone or bones form the pterygopalatine fossa? What muscle(s) originate here?
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Maxillary bone
Palatine bone Zygomatic bone Pterygoid bone Sphenoid bone Pterygoid mm. originate here |
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Identify the parts of the mandible
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A. Condyloid process
B. Coronoid process C. Ramus of mandible D. Mandibular notch E. Angular process F. Body of mandible |
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ID the parts of the hyoid
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A. Stylohyoid
B. Epihyoid C. Ceratohyoid D. Basihyoid E. Thyrohyoid F. Tympanohyoid cartilage |