CRANIAL NERVES.CRANIAL NERVES.

Prof. Mamun Sarhan.Prof. Mamun Sarhan. Head of Neurology Head of Neurology Dept. Dept.

Zagazig UniversityZagazig University

Olfactory Nerve CN IOlfactory Nerve CN I

CLASSIFICATION

FUNCTION

sensory Olfaction (smell)

Olfactory Olfactory Nerve – CN INerve – CN I

Lesion of olfactory nerve : Anosmia

Optic NerveOptic NerveCN IICN II

Optic Nerve – CN IIOptic Nerve – CN II

CLASSIFICATION FUNCTION

l Sensory Convey visual information from the retina

Examination

* visual field* Perimetry* Confrontation method * each eye separately using finger

* Ophthalmoscopic examination* Colour blindness test

Oculomotor NerveOculomotor NerveCN IIICN III

Oculomotor Nerve CN IIIOculomotor Nerve CN IIICLASSIFICATION NUCLEI FUNCTION

Autonomic Edinger-Westphal nuclei Parasympathetic supply to constrictor pupillae and ciliary muscles

Motor Oculomotor nuclei Innervation of levator palpebrae superioris, superior , medial and inferior recti, and inferior oblique muscles of the eye

Oculomotor Nerve – CN IIIOculomotor Nerve – CN III

Trochlear NerveTrochlear NerveCN IVCN IV

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Trochlear Nerve - CN IV Trochlear Nerve - CN IV

CLASSIFICATION motor

NUCLEI Trochlear

FUNCTION Innervation of superior oblique

Abducens NerveAbducens NerveCN VICN VI

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Abducens Nerve CN VIAbducens Nerve CN VI

CLASSIFICATION FUNCTION

motor) Innervation of Lateral rectus muscle of the eye

Lateral rectus muscle

Lateral rectus muscle

Abducens nerve

Abducens nerve

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Abducens Nerve – CN VIAbducens Nerve – CN VI

Trigeminal NerveTrigeminal NerveCN VCN V

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Trigeminal Nerve CN VTrigeminal Nerve CN VSENSORYSENSORY

Facial NerveFacial NerveCN VIICN VII

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Facial Nerve CN VIIFacial Nerve CN VIIMOTORMOTOR

Vestibulocochlear nerveVestibulocochlear nerveCN VIIICN VIII

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

EarEar

GlossopharyngealGlossopharyngealCN IXCN IX

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Glossopharyngeal NerveGlossopharyngeal Nerve

Vagus NerveVagus NerveCN XCN X

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Overview Overview of of

Vagus Vagus NerveNerve

Spinal Accessory NerveSpinal Accessory NerveCN XICN XI

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Spinal Accessory Nerve – CN XISpinal Accessory Nerve – CN XI

CLASSIFICATION NUCLEUS FUNCTION

Special Visceral Efferent Accessory (spinal) To supply sternomastoid and trapezius muscles

UNIVERSITY OF SANTO TOMAS: DEPARTMENT OF NEUROLOGY

Spinal Accessory Nerve – CN XISpinal Accessory Nerve – CN XI

Hypoglossal Nerve Hypoglossal Nerve CN XIICN XII

Thank You!!!Thank You!!!