Functional components of the cranial nerves (animated)

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Lecture class of 30/04/2012

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Functional components of the cranial nerves (animated)

  1. 1. Functionalcomponents ofcranial nervesDr. Ashfaqur RahmanMBBS, MPhil (Anatomy)Assistant Professor (Anatomy)Jahurul Islam Medical College
  2. 2. FUNCTIONAL COMPONENTS of cranial nerves AFFERENT/SENSORY SOMATIC VISCERAL GENERAL SPECIAL GENERAL SPECIALGSA: Carries general somatic senses (touch, pain, temperature, pressure, vibration) & proprioceptive senses from muscles & joints.GVA: Carries general senses from viscera.SSA: Carries special senses of vision, hearing & equilibrium. (EYE & EAR).SVA: Carries special senses of smell & taste. (NOSE & TONGUE). CRANIAL NERVES WITH AFFERENT/SENSORY FIBERS C1,2,5,7,8,9,10 (C1,2,8-PURE SENSORY) (C5,7,9,10-MIXED) (C1,2,7,8,9,10-SPECIAL SENSE CARRYING CRANIAL NERVES )
  3. 3. EFFERENT/MOTOR SOMATIC VISCERAL GENERAL SPECIAL GENERAL SPECIALGSE: Supplies skeletal muscles of somatic (somite/myotome) origin.GVE: Supplies smooth muscles, cardiac muscles & glands (autonomic).SVE: Supplies skeletal muscles of visceral/branchial/pharyngeal arch origin. CRANIAL NERVES WITH EFFERENT/MOTOR FIBERS C3,4,5,6,7,9,10,11,12 (C3,4,6,11,12-PURE MOTOR) (C5,7,9,10-MIXED) (C3,7,9,10-PARASYMPATHETIC CARRYING CRANIAL NERVES) Note: Functional components of spinal nerve are-GSE, GVE, GSA, GVA. GVE components of spinal nerve are mainly sympathetic fibers, whereas GVE components of cranial nerves are exclusively parasympathetic fibers.
  4. 4. Main motor nucleus Edinger-Westphal nucleus Trochlear nucleus Abducent nucleus GSE GVE GSE GSE Ciliary ganglionExtraocular muscles 5 Extraocular muscles 1 Extraocular muscles 1 Intraocular muscles 2 (Skeletal muscle of (Skeletal muscle of (Skeletal muscle of (Smooth muscle) non-arch origin) non-arch origin) non-arch origin)
  5. 5. Motor nucleus Mesencephalic Main sensory Spinal nucleus nucleus nucleus GSA GSA GSA SVE Trigeminal ganglion Proprioceptive Pain & temperature sensation Muscles of 1st arch sensation Touch & pressure (from trigeminal area and(Skeletal muscle of (muscles of sensation (from also from glossopharyngeal arch origin) mastication, trigeminal area) and vagus nerve) face, tongue, orbit)
  6. 6. Motor nucleus Lacrimatory nucleus Superior salivatory nucleus Nucleus of tractus Spinal nucleus of solitarius 5th nerve SVA GVA GSA SVE GVE GVE Geniculate ganglion Pterygo-palatine ganglion Submandibular ganglion Submandibular & External Lacrimal gland Taste sensation General sensation Muscles of 2nd arch sublingual Ear Nasal, palatine & (ant 2/3rd of glands suppliedSkeletal muscle of arch origin) and other minor Meninges of oral gland tongue) by motor fibers salivary gland PCF
  7. 7. Motor nucleus Inferior salivatory nucleus Nucleus of tractus solitarius Spinal nucleus of 5th nerve (nucleus ambiguus) SVA GVA GSA SVE GVE Superior ganglion Inferior ganglion Otic ganglion General sensation from tongue (post 1/3), soft palate, General somatic Taste sensation sensation Muscles of 3 arch rd oropharynx, (post 1/3rd of tongue (pain, touch, temp) from (stylopharyngeus) Parotid gland Tympanic cavity, & adjacent external ear, meningesSkeletal muscle of arch origin) auditory tube, pharyngeal wall) of PCF carotid body, sinus
  8. 8. Motor nucleus Dorsal nucleus Nucleus of tractus solitarius Spinal nucleus of 5th ner(Nucleus ambiguus) GVA SVA GSA GVE SVE Superior ganglion Inferior ganglion Intramural ganglion General sensation from Muscles of 4th & 6th arch Thoracic & abdominal Taste sensation laryngo-pharyngeal General sensation (Muscles of pharynx, larynx & and laryngeal from external ear organs (most post part ofsoft palate with few exceptions) mucosa, Meninges of posterior Glands of pharyngeal(Skeletal muscle of arch origin) tongue/epiglottis) Viscera of thorax, cranial fossa & laryngeal mucosa abdomen. CB
  9. 9. Cranial accessory nucleus Spinal accessory nucleus Hypoglossal nucleus SVE SVE GSE Muscles of the tongueMuscles of soft palate, pharynx and larynx Sternocleidomastoid and Trapezius developed from occipital myotome (Skeletal muscle of arch origin) (Skeletal muscle) (Skeletal muscle of non-arch origin)
  10. 10. SVE GSE GVESVA GVA SSA GSA
  11. 11. OLFACTORY NERVE SVE GSE GVESVA GVA SSA GSA
  12. 12. OPTIC NERVE SVE GSE GVESVA GVA SSA GSA
  13. 13. OCULOMOTOR NERVE SVE GSE GVESVA GVA SSA GSA
  14. 14. TROCHLEAR NERVE SVE GSE GVESVA GVA SSA GSA
  15. 15. TRIGEMINAL NERVE SVE GSE GVESVA GVA SSA GSA
  16. 16. ABDUCENT NERVE SVE GSE GVESVA GVA SSA GSA
  17. 17. FACIAL NERVE SVE GSE GVESVA GVA SSA GSA
  18. 18. VESTIBULOCHCHLEAR NERVE SVE GSE GVESVA GVA SSA GSA
  19. 19. GLOSSOPHARYNGEAL NERVE SVE GSE GVESVA GVA SSA GSA
  20. 20. VAGUS NERVE SVE GSE GVESVA GVA SSA GSA
  21. 21. ACCESSORY NERVE SVE GSE GVESVA GVA SSA GSA
  22. 22. HYPOGLOSSAL NERVE SVE GSE GVESVA GVA SSA GSA

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