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