Special Senses Flashcards
What is the pterion?
The point on the skull where the frontal, parietal , temporal and sphenoid bones meet.
What part of the eye is coloured and responsible for controlling the amount of light that reaches the eye?
Iris
What is the name for the white avascular tissue if the eye?
Sclera
Which chamber sits between the lens and the iris?
The posterior chamber
Which chamber of the eye sits posterior to the lens and comprises most of the body of the eye?
Vitreous chamber
What is the name of the X shaped space where the optic nerves pass to the brain?
Optic chiasm
What is the optic tract?
The continuation of the optic nerve from the optic chiasm to the brain
In which lobe of the brain are visual signals processed?
Occipital lobe
Which gland is responsible for tear production?
Lacrimal gland
What are the functions of tears?
Lubricate movement of the eye
Remove debris
Tears remove debris from the eye and wash it away into…?
The nose
In a blowout fracture of the orbit where do the eyes come to rest?
Maxillary sinus
What are the functions of the paranasal sinuses?
To reduce weight of the skull and the anterior of the face which allows circulation of movement and contributes to the resonance of sounds.
In what directions do the orbits of the eye point?
Superiorly and laterally
Which cranial nerves control the extra-ocular muscles?
Third
Fourth
Sixth
What are the six extra-ocular muscles called?
Superior rectus Inferior rectus Medial rectus Lateral rectus Superior oblique Inferior oblique
Why is incoming air best warmed, humidified and filtered by the nose?
Because it has a rich, superficial blood supply, mucous provides moisture and the mucous and hairs trap particles in the air
Which nerve converts chemical information from olfactants to electrical information that is relayed to the brain?
Cranial nerve one
What is the buccal surface of the tooth?
The medial surface that faces the inside of the cheek
What are the functions of the nasal conchae?
Regulate temperature of inhaled air
Regulate humidity of inhaled air
Help trap foreign particles
Increase turbulence of inhaled air
Which nerve carries information about taste and general sensation from the anterior 2/3 of the tongue?
Lingual nerve
Which nerve carries information about taste and general sensation from the posterior 1/3 of the tongue?
Glossopharyngeal nerve
Which cranial nerve controls most of the tongue muscles?
Hypoglossal
The internal acoustic meatus is found on which part of the temporal bone?
Petrous part
