literature - pavol jozef Šafárik university · n. facialis 8. n. vestibulocochlearis 9. ... •...
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Literature:
Gdovinová Z., Szilasiová J.: Textbook of general neurology. Košice : Aprilla Ltd. for Hanzluvka Books, 2009. 189 s. ISBN 9788089346158 (brož.).
Brust J.C.M.: Neurology. Current Diagnosis and treatment. Lange Medical Books/McGraw-Hill, 2007. 601 pp. ISBN: 13: 978-0-07-110554-5
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Podmienky pre absolvovanie predmetu
100 % active participation in practical exercises, in the case of absence, may substitute up to 3 exercises per semester
Successful completion of the test, evaluation A – E (possibility to repeat the test 2 times).
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Teachers
• Prof. MUDr. Zuzana Gdovinová, CSc.
• Doc. MUDr. Jarmila Szilasiová, PhD• MUDr. Eva Feketeová, PhD
• MUDr. Matej Škorvánek, PhD• MUDr. Marianna Vitková, PhD
• MUDr. Milan Maretta• MUDr. Vladimír Haň
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Cranial nervesCranial nerves1. N. olfactorius2. N. opticus3. N. oculomotorius4. N. trochlearis5. N. trigeminus6. N. abducens7. N. facialis8. N. vestibulocochlearis9. N. glossopharyngeus10. N. Vagus11. N. accessorius12. N. hypoglossus
mesenecefalon
pons
medulla oblongata–bulbar nerves, lateral mixed system
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Cranial nervesCranial nervesExcept of I. and II. nerves all other are PERIPHERAL NERVESNucleus (body of the nerve in brainstem) + nerve (axons and dendrites) + neneuromuscular (gland.) junction
Functions of cranial nervesFunctions of cranial nerves :1. Motoric - muscle, gland2. Sensation - sensitivity3. Senzoric - vision, hearing, balance, smell4. Vegetative - sympat., parasympat., glands.
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The oflactory nerve The oflactory nerve -- n.I.n.I.
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The oflactory nerve The oflactory nerve -- n.I.n.I.Anatomy : fila olf.– bulbus olf. (I.n.)–tractus. olf (II.n.) – trigonum olf.,
subst.perf.ant., septum pellucidum (prim. subcortical centres) – cortexcortex(III.n.) (temporal lobes)
Examination : each nosdril separately – patient sniff the test substance – coffee, soap, etc.
Pathology:hyposmia, anosmia –partial or complet loss of senseparosmiaUncinate fits – hallucination of smell
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The oflactory nerve The oflactory nerve -- n.I.n.I.• Head injury
• Tumors
• Parkinson´s disease
• Alzheimer disease
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The optic nerve The optic nerve -- n.II.n.II.
Anat.: retinal ganglial cells – optic nerve – optic tract – corpus genic. laterale – colliculus sup.laminae quadrig.– tr. geniculocalcarinus (radiatio Gratioleti) – area calcarina (BA 17)
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The optic nerve The optic nerve -- n.II.n.II.
Examination :Neurologist – counting of fingers, perim eter
Oflamologist :
1. Visual aquity2. perimeter (visual field)3. Optic fundus (vessels, yellow and blind spot,
papilla of the n. II.)
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Visual aquity Visual aquity
• Refraction problems,
cataracta, ...
• Glaukoma
• disease of retina, DM, ...
• diseases of optic
nerve– inflammation,, compression,
oedema – blurred vision,
atrophy - blindness
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PerimeterPerimeterVisual field:
deficit = skotoma
Blindness
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Optic fundusOptic fundus
Papilla of n. II:
normal- circular
light pink
oedema – blurred margines
elevated, Dpt (mm)
atrophy – papilla is pale
- with sharp margines, irreversible changes (blindness)
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normal oedema
Atrophy
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Eye moving nervesEye moving nerves
III.- oculomotor nerveIV.- trochlear nerveVI.- abducens nerve
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The oculomotor nerve The oculomotor nerve -- n. IIIn. III
Anatomy : nuclei in the mesencephalon
2 somatomotor2 visceralmotorparasympat. (E-W.)1 nucelus Perli(acommodation, , konvergention)
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The oculomotor nerve The oculomotor nerve -- n. IIIn. III
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The oculomotor nerve The oculomotor nerve -- n. IIIn. III
Intervated muscles
Medial rectus, inferior rectus, superior rectus muscles, inferior oblique muscle and levator palpebrae superioris muscle
Ciliary muscle and constrictor pupillae muscle
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N. OculomotoriusN. Oculomotorius -- n. IIIn. III
Examination:
1. Position of eyeballs2. Wideness of eye 3. Movements of eyeball - horiz., vertik.,
diagon.,konvergention4. Pupils - shape, size, symmetry, reaction to light
(direct, indirect) reaction to konvergention
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The trochlear nerve The trochlear nerve -- n. IVn. IV
Anat.:Inervation of the superior oblique muscle Examination: looking downward
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The trochlear nerve The trochlear nerve -- n. IVn. IV
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The abducens nerve The abducens nerve –– n.VI.n.VI.
Anat.:Lateral rectus muscle
Examination: looking to sides
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ExaminationExamination
1. Position of eyeballs -
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N. IIIN. III-- ptosisptosis
Mitoch. lesion, bilateral ptosis
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N. III N. III -- ptosisptosis
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Examination
2. Wideness of eye (n.III)- symmetrical (ptosis,ptosis, exoftalmus, enoftalmus)exoftalmus, enoftalmus)
3. Movements of eyeballs-horizontally (III.,VI)vertically (III.,)diagonally (III.,IV.)konvergention (III)
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Movements of eyeballs (III,IV,VI)
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Lesions of III., IV., VI. nervesLesions of III., IV., VI. nerves
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5. Examination of pupils5. Examination of pupilssizesizeshape reaction ot light, convergention
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Anizokoria - mydriazis
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Temporal herniation
Compression of mesencephalon and n. III. – mydriasis on one side, FR: not presentUnconsciousness Hemiparesis (plegia)
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Lesion of n. VI.Lesion of n. VI.
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Lesion of n. III., IV., VI.Lesion of n. III., IV., VI.
DIPLOPIA DIPLOPIA – double vision
OFTALMOPLOFTALMOPL ÉÉGIAGIA:OP interna - parasymp. muscles, mydriasis+lost FR + lost accomodationOP externa -incompletaOP externa completaOP totalis =OP interna+OP ext. completa
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Conjugate movements of eyeballs
Centres: A) in pons - nc.paraabducens (PPRF) –reflectoric extravoluntary movementsB) cortical frontal - gy front. medius-FEF- voluntary movements C) cortical P-O - extravoluntary watching movements of subjects in visual field
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Conjugate movements of eyeballs
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(frontal centre (frontal centre -- FEF)FEF)
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INOP-anterior, lesion in FLM
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Parinaud syParinaud sy--paralysis of upward gaze paralysis of upward gaze
Lesion in commissura
posterior (Darkševič.j.)or in n. Perli
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CBH sy CBH sy –– Claude Bernard HornerovClaude Bernard Hornerov sysy
- Lesion of cervical sympathicus centre ciliospinale Budge
- Trias:miosisptosis
enophtalmus
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The trigeminal nerve The trigeminal nerve -- n. V.n. V.
Anatomy – nn. in ponsSenzit. 2nn. + motoric 1n.
Inervation:n. Ophthalmicusn. Maxillarisn. MandibularisMasseter muscles
Vegetat.:cornea
Face sensitivity
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The trigeminal nerve The trigeminal nerve -- n. V.n. V.
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N. V.
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Examination
1. Sensitivity of face 2. Outlets of n.V. (pain)3. Corneal reflex (V.-VII.)4. Tone of masseter muscles 5. Masseter reflex (V.-V.)
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Corneal reflex
• aferent part n.V.n.V.(touching cornea)
• eferent part n. VII. n. VII. (closing of the eye, mimic muscles)
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Examination of n. V.Examination of n. V.
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Trigeminal neuralgia
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Herpes zoster – n.V.
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Trizm –spasm of masseter muscles
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The facial nerve The facial nerve –– n.VII.n.VII.
Anat.: nuclei in ponsInervation:
Senzoric - tasteAutonomic: salivationMotoric: mimic muscles of face and neckSensory: tympanum, external auditory canal, part of the ear (Ramsay-Hunt)
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The facial nerve The facial nerve –– n.VII.n.VII.
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The facial nerve The facial nerve –– n.VII.n.VII.
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Facial nerve - nuclei
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Examination of the n. VII.
Motor : mimic of the face, in rest and voluntary mimic, lower and upper branch
Autonomic: salivation - gl. sublingualis, gl. submandibularis, gl.lacrimalis
Senzoric : taste - anterior 2/3 of tangue
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Examination function of n. VII. (wrinkles, Examination function of n. VII. (wrinkles, whistle, smile)whistle, smile)
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Examination of the upper branch – rise eyebrows frown, shut eyes tightly
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Examination of the upper branch blinking
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Examination of the lower branchshowing the teeth
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Bell´s palsy – periferal n. VII. lesion
Smooth forehead without wrinkles Drawn eyebrow LagophthalmusSmooth nasolabial curveAssymetry of mouthDrawn lips on one sideNot able to show the teethAll on one side –homolateral side to lesion
± taste
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Bell´s palsy – periferal n. VII. lesion
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Examination of the taste
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Upper motor neuron – type facial weakness
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Central lesion of the n. VII.
Assymetry of mouthDrawn lips on one sideNot able to show the teethOn one side –contralateral to affected corticobulbar tract
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Axial reflexes – n. VII.
Fysiological – nasopalpebral (V.+VII)Patological
1. Nasolabial (nasal)2. Mentolabial (mental)3. Saccing
Fysiological in newborns, important for nutrition Patological in adults : lesion of frontal lobe, atrophy of the brain cortex, lesion of both hemispheres – MTS, TU, ...
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Chvostek sign Chvostek sign
Nocking in front of tragus
Patol. response:contraction of mouth angle, face muscles or nose muscles
Increased neuromuscular irritation – tetania
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Vestibulocochlear nerve Vestibulocochlear nerve –– n. VIIIn. VIII
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Vestibulocochlear nerve Vestibulocochlear nerve –– n. VIIIn. VIII
After a short distance from the Brainstemthe Vestibulocochlear Nerve splits to become Vestibular Nerve (balance nerve) and Cochlear Nerve (hearing nerve), as it extends towards the Inner Ear .
Loss of function on CN8 for one side of the head would leave an individual with Single Sided Deafness (SSD) and some balance issues. Loss of function of left and right of the Vestibulocochlear Nerve results in severe balance issues and deafness.
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Vestibular nerve
The vestibule is filled with endolymphatic fluid and is responsible for the somatic balance of the Human Body. It is also innervated by small sensory branches that innervate the parts of the vestibule which include the saccule, the utricle, the anterior, posterior and lateral membrane of the ampulla. Those enter the vestibular ganglion.
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Vestibular nerve
1st neuron
bipolar cells from ganglion vestibulare in the meatus acusticus internus The end of these cells – nuclei (4)
2nd neuron
� tractus vestibulospinalis� tractus vestibuloreticularis� tractus vestibulocerebellaris� tractus vestibulobulbaris� tractus vestibulocorticalis to
temporoparietal cortex
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Cochlear nerve
The cochlea is responsible for sensory hearing the hair cells sits in the spiral organ of corti; 1st neuron ganglion spirale cochlae -nervus cochlearis, through meatus acusticus internus of pyramid to nucleus cochlearis anteriorand posterior in brainstem
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Cochlear nerve
2nd neuron lemnisus medialis to colliculus inferior
3rd neuron To corpus geniculatum laterale, continue to cortex (gyri temporales transversi) area 41 a 42.
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Vestibulocochlear (statoacusticus) Vestibulocochlear (statoacusticus) nerve nerve –– n. VIII)n. VIII)
Vestibular nerve − ncl. vestibularis medialis, lateralis, superior, inferior (4)Cochlear nerve − ncl. cochlearis anterior, posterior (2)Entrance through - meatus acusticus internus, continue to brainstem
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Vestibular syndrome
Lesion of vestibular nuclei and pathways - peripheralCause: ,…symptoms:Spinning
Tilting
SwayingUnbalanced
Pulled to one direction
Abnormal or jerking eye movements (nystagmus)
Feeling nauseatedVomitingAbnormal or jerking eye movements (nystagmus)HeadacheSweatingRinging in the ears or hearing loss
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Vestibular syndrome
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Pathology of n. VIII.
Hearing loss - Hypacusis, anacusisDeafness - Bilateral lesion
Tinnitus - noises in the head, not related to any psychiatric condition. The noise can be heard anywhere in the head or in oneor both ears. So far there are no scientific proven cure for tinnitus.
Hearing pseudohallucinations - e.g. hearing of voices
A pseudohallucination is an involuntary sensory experience vividenough to be regarded as a hallucination, but recognised by the patient not to be the result of external stimuli.
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AudiogramAudiogram
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Glossopharyngeal nerve Glossopharyngeal nerve –– n.IX.n.IX.
Inervated structures: stylofaryngeal muscle which elevate the pharynx during swallowing and talkingExamination: together with n. X. – swalowing, talkingTaste from the posterior 1/3 of tangueSensory function –parotid, salivatory gland
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The vagal nerve The vagal nerve –– n.X.n.X.Inervated structures: all muscles of the pharynx and soft palate except stylopharynegal and tensor fascie lataePeripheral parasympaticusClinical consideration: unilateral paralysis of palate, pharynx, larynxhoarseness – unilateral lesion – paralysis of the vocal cord
PS – slow pulse
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Lesion of n. IX. a X.Lesion of n. IX. a X.
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Accessorial nerve Accessorial nerve –– n. XI.n. XI.
Inervated structures: sternocleidomastoid and trapezius muscles in the neck and back
Examination: turning the neck (cannot turned to opposite side)elevation of the shoulder – displacement of the scapula
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Examination n. XI. Examination n. XI. -- position of scapula, position of scapula, movements of shoulder and SCMmovements of shoulder and SCM
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Hypoglossal nerve Hypoglossal nerve –– n.XII.n.XII.
Inervated structures:TongueExamination: protrusionof the tonguePathology – protrutedtongue deviates toward the paralysedside
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Examination (n.XII) Examination (n.XII)
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Hypoglossal nerve lesion – right side
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Tongue atrophy
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Bulbar and pseudobulbar palsyIn both: dysartria
dysphagia
Differences: BULBAR PSEUDOBULBAR––––––––––––––––––––––––––––––––––––––––––––––––-Lesion medulla oblongata both hemispheres Pat. axial. rr absent presentMasseter.r. normal increasedSmiling, crying absent presentwithout cause