Cranial Nerves

Infratrochlear nerve, a branch of the ophthalmic division of the trigeminal nerve

Frontal nerve, a branch of the ophthalmic division of the trigeminal nerve

Infraorbital nerve, a branch of the maxillary division of the trigeminal nerve

Cornual nerve, a branch of the maxillary division of the trigeminal nerve

Auriculopalpebral nerve, a branch of the facial nerve

The sphincter muscle of the iris receives voluntary, motor innervation via the Optic nerve (CN II).

The lacrimal gland receives parasympathetic innervation from the facial nerve.

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).

The cornea receives sensory innervation via a branch of the Trigeminal nerve.

Both the rostral and caudal bellies are innervated by the mylohoideus nerve a branch of the mandibular division of Trigeminal

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.

The rostral belly of digastricus is innervated by the hypoglossal nerve whilst the caudal belly is innervated by the mandibular division of Trigeminal nerve.

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.

Cochlear division of cranial nerve VIII (vestibulocochlear)

Caudal colliculus

Cochlear nuclei

Medial geniculate nucleus

Vestibular nuclei

Cell bodies of neurones supplying the horn in small ruminants are located in the trigeminal ganglion

Cell bodies of motor neurones innervating the trapezius muscle are located in the 1st 4 cervical segments of the spinal cord.

Cell bodies of preganglionic parasympathetic neurones supplying the stomach are located in the parasympathetic nucleus of X

Cell bodies of cranial nerve I (olfactory) are located in the olfactory bulb

Cell bodies of the neurones forming cranial nerve II (optic) are located in the ganglion cell layer of the retina

Right optic nerve (CNII)

Left oculomotor nerve (CNIII)

Right oculomotor nerve (CNIII)

Left lateral geniculate nucleus

The dorsal and ventral buccal branches are very superficial

The horse lacks a firm muzzle and therefore facial asymmetry is more evident than in other species

The right dorsal and ventral buccal branches have more nerve fibres than the left

The horse's facial musculature is well innervated
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Glossopharyngeal (CNIX), vagus (CNX), accessory (CNXI) and hypoglossal (CNXII) nerves

Facial (CNVII), vagus (CNX), accessory (CNXI) and hypoglossal (CNXII) nerves

Vestibulocochlear (CNVIII), glossopharyngeal (CNIV), vagus (CNX) and accessory (CNXI) nerves

Trigeminal (CNV), glossopharyngeal (CNIV), vagus (CNX) and accessory (CNXI) nerves

Pterygopalatine nerve

Hypoglossal nerve

Lingual nerve

Glossopharyngeal nerve

Maxillary and mandibular nerves

Mandibular and facial nerves

Facial and ophthalmic nerves

Ophthalmic and maxillary nerves

Hypoglossal nerve (CNXII)

Facial nerve (CNVII)

Trigeminal nerve (CNV)

Glossopharyngeal nerve (CNIX)

Medial rectus, dorsal rectus, ventral rectus, retractor bulbi muscles.

Lateral rectus, medial rectus, ventral rectus and ventral oblique muscles.

Medial rectus, dorsal rectus, ventral rectus and ventral oblique muscles

Lateral rectus, medial rectus, dorsal rectus and ventral rectus muscles.

Special somatic efferent (SSE)

General somatic efferent (GSE or SE)

General visceral efferent (GVE or VE)

General somatic afferent (GSA)

Cochlear component of the vestibulocochlear nerve

Chorda tympani

Vestibular component of the vestibulocochlear nerve

Major petrosal nerve

Trigeminal nerve (CNV)

Trochlear nerve (CN IV)

Facial nerve (CNVII)

Oculomotor nerve (CNIII)

CNIII & CNIV

CNII

CNV

CNIII, CNIV & CNV

CNIX & CNX

CN VI

CN VII

CN VIII

CN IX

CN X

CN XI

CN XII

CN V

CN III, CN VII, CN IX & CN X

CN II, CN III, CN VII & CN X

CN II, CN III, CN VII & CN IX

CN I, CN II , CN VII & CN X

CN III

CN VII

CN IX

CN X

CN VII

CN III

CN IX

CN X

CN IX

CN III

CN VII

CN X

CN X

CN III

CN VII

CN IX

CN III, CN IV, CN V & CN VI

CN VII

CN X & CN XI

CN I, CN III & CN III

CN IX, CN X & CN XI

CN XII

CN VII

CN III, CN IV & CN V

CN XII

CN IX, CN X N & CN XI

CN VII

CN VIII

CN IX

CN VII

CN X

CN XI

CN IV

CN V

CN VI

CN III

CN V

CN IV

CN III

CN VI

CN III

CN VII

CN IX

CN X

CN VII

CN III

CN IX

CN X

CN IX

CN X

CN III

CN VII

CN X

CN III

CN VII

CN IX

CN V1 Opthalmic

CN V2 Maxillary

CN V3 Mandibular

CN V1 Opthalmic

CN V2 Maxillary

CN V3 Mandibular

CN III

CN IV

CN VI

CN VII

CN IV

CN III

CN VI

CN VII

CN VI

CN IV

CN III

CN VII

CN V2 Maxillary

CN V1 Opthalmic

CN V3 Mandibular

Dorsal oblique

Lateral rectus & retractor bulbi

Medial, ventral & dorsal rectus and the ventral oblique

Lateral rectus & retractor bulbi

Dorsal oblique

Medial, dorsal & ventral rectus and the ventral oblique.

Medial, ventral & dorsal rectus and the ventral oblique

Dorsal oblique

Lateral rectus & retractor bulbi

CN XI

CN XII

CN X

CN IX

CN VII

III, VII, IX, X

V, VI, VII, XI

V, VII, IX, X, XI

IX, X, XI, XII

III, IV, VI, XII

Hypoglossal

Glossopharyngeal

Vagus

Trigeminal

Facial

Maxillary V

Mental branch of mandibular V

Infraorbital branch of maxillary V

Mandibular V

Facial VII

Mental branch of mandibular V

Infraorbital branch of maxillary V

Auriculotemporal branch of V

Maxillary V

Facial VII

Optic (II)

Trochlear (IV)

Oculomotor (III)

Trigeminal (V)

Olfactory (I)

Auriculopalpebral (VII)

Facial (VII)

Mandibular (V)

Infraorbital (V)

Auriculotemporal (V)

Dorsal buccal (VII)

Mandibular n. (V3)

Maxillary n. (V2)

Auriculopalpebral (VII)

Ophthalmic (V)

Accessory (XI)

Facial (VII)

Vagus (X)

Hypoglossal (XII)

Glossopharyngeal (IX)

Facial n (VII)

Vagus n (X)

Abducens n (VI)

Accessory n (XI)

Glossopharyngeal n (IX)

Maxillary n (V)

Oculomotor n (III)

Ophthalmic n (V)

Auriculopalpebral n (VII)

Dorsal buccal n (VII)