Where is foramen lacerum? What goes through it?
Answer:
Petrous temporal bone.
Upper end transmits ICA with sympathetic nerves.
Lower end is covered...
What is the position of the superior orbital fissure?
What is the position of the superior orbital fissure?
Answer: Between the greater and lesser wings of sphenoi...
What goes through foramen ovale?
What goes through foramen ovale?
Answer:
CN V3 (mandibular nerve)
Accessory meningeal arte...
What goes through foramen rotundum?
What goes through foramen rotundum?
Answer:
CN V2 (maxillary nerve).
Small veins from cavernous sinu...
Where does each maxillary sinus drain?
Where does each maxillary sinus drain?
Answer: Into the middle meat...
Where does the sphenoid sinus drain?
Where does the sphenoid sinus drain?
Answer: Into the superior meat...
What important structure lies laterally on either side of the sphenoidal sinus?
What important structure lies laterally on either side of the sphenoidal sinus?
Answer: Cavernous sin...
What important structures lie above the sphenoidal sinus? (2)
What important structures lie above the sphenoidal sinus? (2)
Answer:
1) Pituitary fossa housing pituitary gland.
2) Optic chiasma and nerv...
What is the pattern of drainage of the ethmoidal air cells?
What is the pattern of drainage of the ethmoidal air cells?
Answer:
Anterior - open into hiatus semilunaris (in middle meatus)
Middle - open into...
Where does each frontal sinus open?
Where does each frontal sinus open?
Answer: Middle meatus of the nasal cavity, either through ethmoidal infundibulum or directly via frontonasal...
What are the two main functions of the aqueous humour?
What are the two main functions of the aqueous humour?
Answer:
1) It provides and removes necessary metabolites to/from the lens, cornea and iris.
2)...
What is the average aqueous humour production rate?
What is the average aqueous humour production rate?
Answer: 2-4 microlitres a minut...
What is the average volume of the AC
What is the average volume of the AC
Answer: 250 microlitr...
What is the average central AC depth?
What is the average central AC depth?
Answer: 3...
What are zonules made of?
What are zonules made of?
Answer: A unique fibrous non-collagenous protein similar to elastin. The microfibrils contain fibrillin.
...
Where do the zonules arise from?
Where do the zonules arise from?
Answer: From the pars plana of the ciliary bod...
How are superficial lens fibres (elongated lens cells) different from deeper fibres?
How are superficial lens fibres (elongated lens cells) different from deeper fibres?
Answer:
The deeper lens fibres are anucleate.
The more superficial...
Where is the maximal mitotic activity of the lens epithelium?
Where is the maximal mitotic activity of the lens epithelium?
Answer: Pre-equatorially and equatorially, at the germinative zon...
How do the lens epithelial cells change going from centre to equator?
How do the lens epithelial cells change going from centre to equator?
Answer: They become more columnar and elongate, and form lens fibre...
Where is the lens epithelium found?
Where is the lens epithelium found?
Answer: On the anterior surface onl...
What type of epithelium is the lens epithelium?
What type of epithelium is the lens epithelium?
Answer: Simple cuboidal epitheliu...
What is the lens capsule made of?
What is the lens capsule made of?
Answer: It is a thickened smooth basement membrane produced by the lens epithelium. It consists of glycoproteins,...
What are the three parts of the lens?
What are the three parts of the lens?
Answer:
Capsule
Lens epithelium
Lens fibres...
What are 1) the average lens diameter and 2) the lens axial length in the adult?
What are 1) the average lens diameter and 2) the lens axial length in the adult?
Answer:
1) 10mm
2) 4...
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