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====Innervation and Vascularisation of the Outer Ear====

====Innervation and Vascularisation of the Outer Ear====

The vascular supply to the outer ear is provided by the '''great auricular arteries''' (ex internal carotid artery).  Venous drainage is via satellite veins to the '''internal maxillary veins'''.  Innervation is provided by the '''auriculopalpebral branches of [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|cranial nerve VII]] to the auricular muscles and sensory supply by [[Equine Cranial Nerves - Horse Anatomy#Optic Nerve (II)|cranial nerve II]] and [[Equine Cranial Nerves - Horse Anatomy#Trigeminal Nerve (V)|cranial nerve V]].

The vascular supply to the outer ear is provided by the '''great auricular arteries''' (ex internal carotid artery).  Venous drainage is via satellite veins to the '''internal maxillary veins'''.  Innervation is provided by the '''auriculopalpebral branches of [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|cranial nerve VII]]''' to the auricular muscles and sensory supply by [[Equine Cranial Nerves - Horse Anatomy#Optic Nerve (II)|cranial nerve II]] and [[Equine Cranial Nerves - Horse Anatomy#Trigeminal Nerve (V)|cranial nerve V]].

In the tissues medial to the ear canal lie the auricular and superficial temporal arteries.  Laterally is the '''parotid salivary gland''' and also a branch of the [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|facial nerve (VII)]], external maxillary vein and branches of the external carotid artery.  The [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|facial nerve]] exits the skull through the stylomastoid foramen behind the osseous bulla; it passes below the rostroventral aspect of the horizontal ear canal.  The '''auriculo-temporal''' branch of the mandibular portion of the [[Equine Cranial Nerves - Horse Anatomy#Trigeminal Nerve (V)|trigeminal nerve]] (CN V) and branches of the [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|facial nerve]]  pass rostral to the vertical ear canal.

In the tissues medial to the ear canal lie the auricular and superficial temporal arteries.  Laterally is the '''parotid salivary gland''' and also a branch of the [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|facial nerve (VII)]], external maxillary vein and branches of the external carotid artery.  The [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|facial nerve]] exits the skull through the stylomastoid foramen behind the osseous bulla; it passes below the rostroventral aspect of the horizontal ear canal.  The '''auriculo-temporal''' branch of the mandibular portion of the [[Equine Cranial Nerves - Horse Anatomy#Trigeminal Nerve (V)|trigeminal nerve]] (CN V) and branches of the [[Equine Cranial Nerves - Horse Anatomy#Facial Nerve (VII)|facial nerve]]  pass rostral to the vertical ear canal.