Question 1
Question
Which nerve innervates the horn in cattle and is blocked when de-horning?
Answer
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Infratrochlear nerve, a branch of the ophthalmic division of the trigeminal nerve
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Frontal nerve, a branch of the ophthalmic division of the trigeminal nerve
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Infraorbital nerve, a branch of the maxillary division of the trigeminal nerve
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Cornual nerve, a branch of the maxillary division of the trigeminal nerve
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Auriculopalpebral nerve, a branch of the facial nerve
Question 2
Question
Which ONE of the following statements regarding the innervation of the eye and adnexa is FALSE?
Answer
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The sphincter muscle of the iris receives voluntary, motor innervation via the Optic nerve (CN II).
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The lacrimal gland receives parasympathetic innervation from the facial nerve.
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The extraocular muscles that control the position of the eye in the orbit receive motor innervation from cranial nerves III (oculomotor), IV (trochlear) and VI (abducens).
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The cornea receives sensory innervation via a branch of the Trigeminal nerve.
Question 3
Question
Concerning the motor innervation of the rostral and caudal bellies of the digastricus muscle:
Answer
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Both the rostral and caudal bellies are innervated by the mylohoideus nerve a branch of the mandibular division of Trigeminal
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The rostral belly is innervated by the digastric nerve a branch of the mandibular division of trigeminal whilst the caudal belly is innervated by the mylohyoideus nerve a branch of the facial nerve.
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The rostral belly of digastricus is innervated by the hypoglossal nerve whilst the caudal belly is innervated by the mandibular division of Trigeminal nerve.
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The rostral belly is innervated by the mylohoideus nerve a branch of the mandibular division of trigeminal nerve whilst the caudal belly is innervated by the digastric nerve a branch of the facial nerve.
Question 4
Question
All of the following are components of the auditory pathways to conscious level EXCEPT:
Question 5
Question
Which of the following statements concerning location of nerve cell bodies is FALSE?
Answer
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Cell bodies of neurones supplying the horn in small ruminants are located in the trigeminal ganglion
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Cell bodies of motor neurones innervating the trapezius muscle are located in the 1st 4 cervical segments of the spinal cord.
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Cell bodies of preganglionic parasympathetic neurones supplying the stomach are located in the parasympathetic nucleus of X
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Cell bodies of cranial nerve I (olfactory) are located in the olfactory bulb
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Cell bodies of the neurones forming cranial nerve II (optic) are located in the ganglion cell layer of the retina
Question 6
Question
A cat comes into your practice for an eye examination. You test the ocular reflexes and you find:
- a normal bilateral menace response
- a normal direct pupillary light reflex (PLR) in the right eye but no consensual PLR in the left eye
- no direct PLR in the left eye but a normal consensual PLR in the right eye
- a drooping upper eyelid on the left side
Where is the lesion most likely to be?
Answer
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Right optic nerve (CNII)
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Left oculomotor nerve (CNIII)
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Right oculomotor nerve (CNIII)
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Left lateral geniculate nucleus
Question 7
Question
Why would paralysis of the dorsal and ventral buccal branches of the right facial nerve (CNVII) result in marked clinical signs in the horse?
Answer
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The dorsal and ventral buccal branches are very superficial
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The horse lacks a firm muzzle and therefore facial asymmetry is more evident than in other species
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The right dorsal and ventral buccal branches have more nerve fibres than the left
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The horse's facial musculature is well innervated
Check
Question 8
Question
Guttural pouch disease frequently causes neurological signs that can include cranial nerve deficits. This is because five cranial nerves pass through the walls of the guttural pouch of the horse. One of these passes through the lateral compartment and is rarely affected by disease, the other four run through the medial compartment and are commonly affected by disease.
Which four cranial nerves run through the medial compartment of the guttural pouch?
Answer
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Glossopharyngeal (CNIX), vagus (CNX), accessory (CNXI) and hypoglossal (CNXII) nerves
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Facial (CNVII), vagus (CNX), accessory (CNXI) and hypoglossal (CNXII) nerves
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Vestibulocochlear (CNVIII), glossopharyngeal (CNIV), vagus (CNX) and accessory (CNXI) nerves
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Trigeminal (CNV), glossopharyngeal (CNIV), vagus (CNX) and accessory (CNXI) nerves
Question 9
Question
Which nerve does the chorda tympani (a branch of the facial nerve (CNVII) join outside of the tympanic bulla?
Answer
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Pterygopalatine nerve
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Hypoglossal nerve
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Lingual nerve
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Glossopharyngeal nerve
Question 10
Question
The image below shows a dog head from a right lateral view. The skin and superficial muscles have been removed. Which branch of the trigeminal nerve (CNV) is indicated by A?
Answer
-
Infraorbital nerve
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Mental nerve
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Mandibular nerve
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Ventral buccal branch
Question 11
Question
You are a vet in small animal general practice. You examine a dog and find the following:
- atrophy of the left temporalis and masseter muscles
- hypertrophy of the right temporalis and masseter muscles
- no lateral palpebral reflex on the left lower eye tested.
- normal blinking was observed during the consultation
Answer
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Maxillary and mandibular nerves
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Mandibular and facial nerves
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Facial and ophthalmic nerves
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Ophthalmic and maxillary nerves
Question 12
Question
Which cranial nerve provides motor innervation to the tongue?
Question 13
Question
Which extrinsic muscles of the eye does the oculomotor nerve (CN III) provide motor innervation to?
Answer
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Medial rectus, dorsal rectus, ventral rectus, retractor bulbi muscles.
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Lateral rectus, medial rectus, ventral rectus and ventral oblique muscles.
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Medial rectus, dorsal rectus, ventral rectus and ventral oblique muscles
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Lateral rectus, medial rectus, dorsal rectus and ventral rectus muscles.
Question 14
Question
Nerve fibres can be classified according to: distribution, tissue supplied and signal direction. Using these three categories how would the accessory nerve (CNXI) be classifed?
Answer
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Special somatic efferent (SSE)
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General somatic efferent (GSE or SE)
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General visceral efferent (GVE or VE)
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General somatic afferent (GSA)
Question 15
Question
The image below shows the canine cranium from a left ventral oblique view. What is the name of the opening from the cranium (i.e. fissure, foramen or canal) indicated by the arrow? Which cranial nerve emerges from it?
Answer
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Hypoglossal canal; hypoglossal nerve (CNXII)
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Jugular foramen; vagus nerve (CNX)
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Oval foramen; trigeminal nerve mandibular branch(CNV3)
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Stylomastoid foramen; facial nerve (CNVII)
Question 16
Question
Which cranial nerve branch passes all the way through the middle ear cavity?
Question 17
Question
Which cranial nerve is the only one to attach to the brain at the pons?
Answer
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Trigeminal nerve (CNV)
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Trochlear nerve (CN IV)
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Facial nerve (CNVII)
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Oculomotor nerve (CNIII)
Question 18
Question
Which cranial nerve(s) attach to the midbrain?
Answer
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CNIII & CNIV
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CNII
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CNV
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CNIII, CNIV & CNV
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CNIX & CNX
Question 19
Question
Which one of these cranial nerves does NOT attach to the Medulla oblongata?
Answer
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CN VI
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CN VII
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CN VIII
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CN IX
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CN X
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CN XI
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CN XII
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CN V
Question 20
Question
What are the cranial nerves which provide parasympathetic supply?
Answer
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CN III, CN VII, CN IX & CN X
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CN II, CN III, CN VII & CN X
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CN II, CN III, CN VII & CN IX
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CN I, CN II , CN VII & CN X
Question 21
Question
Which cranial nerve provides parasympathetic supply to constrict the pupil size?
Question 22
Question
Which cranial nerve provides parasympathetic nerve supply to the lacrimal gland and the salivary glands sublingual and mandibular?
Question 23
Question
Which cranial nerve provides parasympathetic nerve supply to the parotid salivary gland?
Question 24
Question
Which cranial nerve provides parasympathetic nerve supply to the viscera of viscera of cervical, thorax and abdomen?
Question 25
Question
Which cranial nerve(s) pass through the orbital fissure?
Question 26
Question
Which cranial nerve(s) pass through the jugular foramen?
Answer
-
CN IX, CN X & CN XI
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CN XII
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CN VII
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CN III, CN IV & CN V
Question 27
Question
Which cranial nerve(s) passes through the hypoglossal canal?
Answer
-
CN XII
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CN IX, CN X N & CN XI
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CN VII
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CN VIII
Question 28
Question
Which cranial nerve provides the sensory input for taste of the caudal 1/3 of the tongue?
Question 29
Question
Which cranial nerve is the smallest in size?
Question 30
Question
Which cranial nerve is the largest in size?
Question 31
Question
The Parasympathetic pathway where Preganglionic fibres run to the cilary ganglion describes which cranial nerve?
Question 32
Question
The Parasympathetic pathway where Preganglionic fibres run to the pterygopalatine and mandibular ganglion describes which cranial nerve?
Question 33
Question
The Parasympathetic pathway where Preganglionic fibres run to the otic ganglion describes which cranial nerve?
Question 34
Question
The Parasympathetic pathway where Preganglionic fibres run to the terminal ganglion describes which cranial nerve?
Question 35
Question
Which trigeminal branch CN V provides sensory input from the cornea and upper eyelids?
Answer
-
CN V1 Opthalmic
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CN V2 Maxillary
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CN V3 Mandibular
Question 36
Question
Which trigeminal nerve branch CN V provides sensory input from the lower eye lids?
Answer
-
CN V1 Opthalmic
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CN V2 Maxillary
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CN V3 Mandibular
Question 37
Question
What cranial nerve must have a dysfunction for a ventrolateral strabismus?
Answer
-
CN III
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CN IV
-
CN VI
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CN VII
Question 38
Question
What cranial nerve must have a dysfunction for a extorsional strabismus?
Answer
-
CN IV
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CN III
-
CN VI
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CN VII
Question 39
Question
What cranial nerve must have a dysfunction for a medial strabismus?
Answer
-
CN VI
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CN IV
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CN III
-
CN VII
Question 40
Question
What branch of CNV arises from the rostral alar foramen?
Answer
-
CN V2 Maxillary
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CN V1 Opthalmic
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CN V3 Mandibular
Question 41
Question
What muscle(s) does CN IV innervate?
Question 42
Question
What muscle(s) does CN VI innervate?
Question 43
Question
What muscle(s) does CN III innervate?
Question 44
Question
What cranial nerve is innervates muscles for neck turning?
Answer
-
CN XI
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CN XII
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CN X
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CN IX
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CN VII
Question 45
Question
Which of the following groups of cranial nerves all contain general visceral Efferent (GVE) components?
Answer
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III, VII, IX, X
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V, VI, VII, XI
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V, VII, IX, X, XI
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IX, X, XI, XII
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III, IV, VI, XII
Question 46
Question
The extrinsic muscles of the tongue receive motor innervation from?
Answer
-
Hypoglossal
-
Glossopharyngeal
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Vagus
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Trigeminal
-
Facial
Question 47
Question
Which nerve supplies motor innervation to muscles such as levator nasolabialis?
Question 48
Question
Which branch of which nerve supplies cutaneous sensation to the chin?
Answer
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Mental branch of mandibular V
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Infraorbital branch of maxillary V
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Auriculotemporal branch of V
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Maxillary V
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Facial VII
Question 49
Question
Which cranial nerve passes through the cribiform plate of the skull?
Answer
-
Optic (II)
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Trochlear (IV)
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Oculomotor (III)
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Trigeminal (V)
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Olfactory (I)
Question 50
Question
The upper premolars and molars are innervated by:
Answer
-
Auriculopalpebral (VII)
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Facial (VII)
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Mandibular (V)
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Infraorbital (V)
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Auriculotemporal (V)
Question 51
Question
The cornual nerve supplies sensory innervation to the bovine horn. From which nerve is it derived?
Answer
-
Dorsal buccal (VII)
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Mandibular n. (V3)
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Maxillary n. (V2)
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Auriculopalpebral (VII)
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Ophthalmic (V)
Question 52
Question
Which cranial nerve supplies sensory innervation to the larynx?
Answer
-
Accessory (XI)
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Facial (VII)
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Vagus (X)
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Hypoglossal (XII)
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Glossopharyngeal (IX)
Question 53
Question
the carotid sinus at the origin of the internal carotid artery is innervated by
Answer
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Facial n (VII)
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Vagus n (X)
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Abducens n (VI)
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Accessory n (XI)
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Glossopharyngeal n (IX)
Question 54
Question
The cornea receives sensory innervation from the long ciliary nerves of