Chapter 22 facial nerve.

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Presentation transcript:

Chapter 22 facial nerve

Facial nerve Motor nucleus: main motor nucleus Parasympathetic nucleus: superior salivatory nucleus Sensory nucleus: solitary nucleus spinal nucleus of the trigeminal nerve Nervus intermedius

Abducens nucleus Internal genu Facial colliculus

Facial cannel Axial view Coronal view

Facial palsy Upper motor neuron type (supranuclear or central ) : ex: stroke… Lower motor neuron type (infranuclear or peripheral ) ex: Bell’s palsy……

Facial nerve Motor nucleus: main motor nucleus Parasympathetic nucleus: superior salivatory nucleus Sensory nucleus: solitary nucleus spinal nucleus of the trigeminal nerve Nervus intermedius

Nervus intermedius- parasympathetic fibers Lacrimal gland Nasal mucosa sphenopalatine ganglion Great petrosal nerve Nervus intermedius superior salivatory nucleus Corda tympani Lingual nerve Submandibular ganglion Submandibular gland Submaxillary gland

Crocodile tears

Facial nerve Motor nucleus: main motor nucleus Parasympathetic nucleus: superior salivatory nucleus Sensory nucleus: solitary nucleus spinal nucleus of the trigeminal nerve Nervus intermedius

Nervus intermedius- sensory fibers Geniculate ganglion SVA: taste of the anterior two-third of tongue (corda tympani and Gustatory nucleus ) GSA: sensory of external meatus

Summary of taste

Solitary nucleus Visceral afferent nucleus: primary afferents supplying the alimentary tract and respiratory tract

Cerebellopontine angle CP angle 有 4 條nerves: facial, cochlear, sup. + inf. Vestibular

CPA tumor: vestibular schwannoma

A

Summary of cranial nerve parasympathetic pathways

Facial colliculus

40 year-old, male with a brain tumor over right parietal area

Left Right