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Special Senses Imaging Quiz. Developed by: Sorcha McCaughley & Mark Brims Approved by: Gawain Hammond & Maureen Bain Supported by: The Chancellor’s Fund. Special Senses Imaging Quiz. START! Developed by: Sorcha McCaughley & Mark Brims Supported by: The Chancellor’s Fund. Special Senses. - PowerPoint PPT Presentation
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Special Senses Imaging QuizDeveloped by: Sorcha McCaughley & Mark BrimsApproved by: Gawain Hammond & Maureen BainSupported by: The Chancellor’s Fund
Special Senses Imaging Quiz
START!
Developed by: Sorcha McCaughley & Mark BrimsSupported by: The Chancellor’s Fund
Special Senses
• The Eye Q1• The Ear Q2
The Eye Q1• (i) A makes up part of the
Orbit. What is it?– Zygomatic Arch– Zygomatic Process
• (ii) Which of the fossae, foraminae and fissures in the Orbit is connected, via a duct, to the nasal cavity?– Ethmoidal Foraminae– Lacrimal Sac Fossa– Orbital Fissure
Canine
A
Canine – Contrast showing duct in (ii).
Correct • Yes! A is the Zygomatic
Arch!
• The Zygomatic Process is the incomplete Zygomatic Arch in horses and ruminants.
• Try (ii)!• Choose a new question.
Canine
Zygomatic Arch
Zygomatic Process
Bovine
Incorrect • No, A is not the Zygomatic
Process!
• Remember: the Zygomatic Process is the incomplete Zygomatic Arch found in horses and ruminants.
• Try again!• Choose a new question.
Canine
Zygomatic Arch
Zygomatic Process
Bovine
Correct • Yes! The Lacrimal Sac
Fossa connects with the Nasolacrimal Duct!
• Try The Ear Q2!• Choose a new question.
Nasolacrimal Duct
Incorrect • No, the Ethmoidal Foraminae do not connect
with the nasal cavity.
• Blood vessels and branches of the Ophthalmic nerve are found in the Ethmoidal Foraminae.
• Try again!• Choose a new question.
Incorrect • No, the Orbital Fissure does not connect with
the nasal cavity.
• The Orbital Fissure carries nerves and the ophthalmic vein.
• Try again!• Choose a new question.
The Ear Q2 • In this x-ray you can see the outline of the ear.
• (i) Why is it not as white as the bones of the skull?– Answer.
• (ii) What is A?– Tympanic Bulla– External Ear Cartilages– External Acoustic Meatu
s• (iii) What is B?
– Tympanic Bulla– External Ear Cartilages– External Acoustic Meatu
s
A
B
Answer
• Normally, cartilage cannot be seen on an x-ray as it is softer and less dense than bone.
• This x-ray would be described as ‘under-exposed’. This means that the soft tissue structures are more visible.
• Try (ii)!• Choose a new question.
Correct • Yes! A is the External Ear Cartilage!
• It is not usually visible on x-rays as it is cartilage, not bone.
• Try (iii)!• Choose a new question.
Incorrect • No, A is not the
Tympanic Bulla.
• The Tympanic Bullae are shown in this x-ray.
• Try again!• Choose a new question.
Tympanic Bulla
Tympanic Bullae
Incorrect • No, A is not the External Acoustic Meatus.
• The External Acoustic Meatus connects the External Ear to the Tympanic Bullae.
• Try again!• Choose a new question.
Correct • Yes! B is the External
Acoustic Meatus!
• The outer part, nearest the external ear, is cartilagenous; it is rarely visible on x-rays.
• The inner part, as it approaches the Tympanic Bulla, is osseus; it can sometimes be seen in x-rays.
• Choose a new question.
External Acoustic Meatus
Incorrect • No, B is not the External
Ear Cartilage.
• The External Ear Cartilages support the pinna of the Ear.
• Try again!• Choose a new question.
External Ear Cartilage
Incorrect • No, B is not the
Tympanic Bulla.
• The Tympanic Bulla is found at the end of the External Acoustic Meatus.
• Try again!• Choose a new question.
Tympanic Bulla
Tympanic Bullae