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16 Cards in this Set
- Front
- Back
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where are temporal bones (irregular bones) situated |
sides of skull |
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what part of the face does the temporal bone support |
the temple, houses the structures of the organ of hearing |
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temporal bone nerves and vessels |
lower 7 CN's & major vessels to form the brain transverse the temporal bone |
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five parts of temporal bone: |
1. Squama temporalis 2. Mastoid portion 3. Petrous portion (petrosal ridge) 4. Tympanic part 5. Styloid process |
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1. Squama temporalis |
very thin that it's translucent scaly appearance temporalis muscle attaches to this area |
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2. Mastoid portion |
heavier and rough attaches to auricular muscles of the outer ear foramina (holes) throughout bone allow nerves, arteries and veins to pass through skull |
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3. Petrous portion (petrosal ridge) |
dense bone, pyramidal & wedged at the base of skull between sphenoid & occipital bones - forms part of endocranium protects inner ear from damage fuses with inner pieces of mastoid and squama temporalis portions |
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4. Tympanic part |
separate from the rest of the temporal pieces at birth fuses together with the rest of the temporal bones in most mammals borders the external acoustic meatus (cartilaginous outer ear) |
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5. Styloid process |
attachment for muscle |
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cavities and canals found on: |
Anterior surface Posterior surface Inferior surface |
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Anterior surface |
Sup semicircular canal Facial canal Carotid canal |
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Sup semicircular canal |
filled with fluid - endolymph & contains motion sensors within the fluids |
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Facial canal |
greater superficial petrosal nerve and the petrosal branch of the middle meningeal artery |
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Carotid canal |
the ICA and carotid plexus enters the middle cranial fossa from the neck |
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Posterior surface |
Internal acoustic meatus: transmits the facial nerve (VII) and vestibulococlear nerves (VIII) and the labyrinthine artery (an internal auditory branch of the basilar artery) |
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Inferior surface |
Jugular fossa - lodges the bulb of the internal jugular vein stylomastoid foramen - termination of facial canal and transmits facial nerve |
