Special Senses Imaging Quiz - PowerPoint PPT Presentation

Special Senses Imaging Quiz

Developed by: SorchaMcCaughley & 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

• The Eye Q1
• The Ear Q2

Canine

• (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

A

Canine – Contrast showing duct in (ii).

Canine

• Yes! A is the Zygomatic Arch!
• The Zygomatic Process is the incomplete Zygomatic Arch in horses and ruminants.
• Try (ii)!
• Choose a new question.

Zygomatic Arch

Bovine

Zygomatic Process

Canine

• 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.

Zygomatic Arch

Bovine

Zygomatic Process

• Yes! The Lacrimal Sac Fossa connects with the Nasolacrimal Duct!
• Try The Ear Q2!
• Choose a new question.

Nasolacrimal Duct

• 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.

• 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.

• 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 Meatus
• (iii) What is B?
• Tympanic Bulla
• External Ear Cartilages
• External Acoustic Meatus

B

A

• 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.

• 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.

• 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

• 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.

• 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

• 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

• 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