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SOMATIC SENSORY SYSTEM AQSA SJUHADA Department of Oral Biology Faculty of Dentistry Airlangga University.

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Presentation on theme: "SOMATIC SENSORY SYSTEM AQSA SJUHADA Department of Oral Biology Faculty of Dentistry Airlangga University."— Presentation transcript:

1 SOMATIC SENSORY SYSTEM AQSA SJUHADA Department of Oral Biology Faculty of Dentistry Airlangga University

2 REFLEX Effector Central Nervous System Receptor Afferent system Efferent system Stimulation Muscle

3 Senses = indera/ sensasi-sensoris Somatik Khusus /special : Otonomik visus,olfactorius,auditorius,vestibular, taste

4 SENSORY RECEPTOR - The part of a neuron or specialized cells that generates action potential in neuron. -Often associated with nonneural cells that surround it, forming a sense organ -Including mechanical (touch, pressure), thermal (degree of warmth), electromagnetic (light), chemical energy (odor, taste, concentration of O 2 and CO 2 ) -Require adequate stimulus to generate action potential

5 SENSORY MODALITY -Vision -Hearing -Smell -Taste -Rotational acceleration -Linear acceleration -Touch-pressure -Warmth -Cold -Pain -Joint position and movement -Muscle length -Muscle tension -Arterial blood pressure -Central venous pressure -Inflation of lung -Blood temperature in brain -Arterial PO2 -pH of CSF -Osmotic pressure of plasma -Arteiovenous blood glucose difference

6 Classification of sensory receptors: 1.Teleceptors (distance receivers) 2.Exteroceptors 3.Interoceptors 4.Proprioceptors (body image) Cutaneous sense : -Touch-pressure -Cold-warmth -Pain

7 Cutaneous sense organ: Ruffini endings : heavy touch, pressure Ruffini endings : heavy touch, pressure Merkels disks : touch, low freq. vibration Merkels disks : touch, low freq. vibration Meissners corpuscles : light touch Meissners corpuscles : light touch Paccinian corpuscles : touch, vibration Paccinian corpuscles : touch, vibration Free nerve ending : pain Free nerve ending : pain

8 Two systems in sensory transmission: 1.The dorsal column-Lemniscal System - localization touch system - fine touch system - vibratory sensation - position - pressure 2.The anterolateral system / sys. spinothalamicus lateralis - pain - thermal sensation - tickle and itch sensation - sexual sensation - crude touch

9 TONGUE Has 2 important innervations Has 2 important innervations 1.N. lingualis (branch of N. trigeminus), innervate the pressure, touch and pain. 2.N. facialis, innervate the taste

10 PAIN Sheringtons philosophy: unique built-in unpleasant affect the physical adjunct of an imperative protective reflex

11 PAIN Is one of the somatic sensory modalities Is one of the somatic sensory modalities Receptor: FREE NERVE ENDING Receptor: FREE NERVE ENDING Sensory peripheral nerve: - Aδ type (myelinated): for fast pain - C type (unmyelinated): for slow pain Sensory peripheral nerve: - Aδ type (myelinated): for fast pain - C type (unmyelinated): for slow pain Medulla spinalis conduction: - anterolateral system atau tractus spinothalamicus lateralis Medulla spinalis conduction: - anterolateral system atau tractus spinothalamicus lateralis Center of perception and interpretation: - gyrus post-centralis / SSA I Center of perception and interpretation: - gyrus post-centralis / SSA I

12 Fast pain: -Also known as sharp pain, pricking pain, acute pain, electric pain. -Occurs within about 0.1 seconds after pain stimulus applied Slow pain -Begins after 1 second or more seconds after pain stimulus applied and then increases slowly. -Also known as burning pain, aching pain, throbbing pain, nauseous pain, chronic pain. In which category DENTAL PAIN belongs to?

13 S. S. A. I : Gyrus Postcentralis PAIN - Impuls pathways Free nerve endings A / C Med. Spinalis Thalamus Tr. Spino- thala micus

14 Pain mechanism on Free Nerve Ending trauma Neurolemma / axolemma Some substances Free nerve ending

15 STIMULATIONS can generate PAIN Mechanics, Thermal Chemical, Electrical Ischemia / infark Muscle spasm

16 Sensory nerve Free nerve ending large view

17 Traumatic Lesion Action Potential Free nerve ending Damaged cells PE Polypeptide + Some substance

18 Some substance Axolemma Permeability Very easy to generate action potential Free nerve ending

19 Some substance BradikininProstaglandin HistaminSubstan P Serotonin Leukotrien Enzim proteolitikdll.

20 Cephalgi Causal : Intra cranial Extra cranial Meningitis, encephalitis Trauma kepala Tek. Cairan serebro-spinal Tumor, dll. Spasme otot leher, kepala. Sinusitis, obstruksi nasi. Febris, influenza dll.

21 Thalamus Tempat relay / sinap : Impuls sensoris, kecuali : Olfactorius & Otonomik

22 Thalamus synonym : kamar bertirai Impuls Nyeri sinap di : Nuclei ventrobasal

23 Resume Receptor Med. spinalis Thalamus S.S.A. I = Gyrus postcentralis Dibantu oleh : SSA.II & SSAA

24 HOME WORK : Bagaimana konduksi impuls NYERI daerah wajah, gigi-geligi & lidah ? Kirim ke sjuhada@toughguy.net atau klik situs www.sjuhada.educations.net Paling lambat 1 minggu


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