Anes-Lecture-2-111616-111816.pdf - Dr Celian Teng Lecture#2 Anesthesiology Neurophysiology • inversely proportional to an individual’s pain Impulse

Anes-Lecture-2-111616-111816.pdf - Dr Celian Teng Lecture#2...

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Dr. Celian Teng Lecture #2 (11/16/16 & 11/18/16) Anesthesiology Page of 1 4 Neurophysiology Impulse Generation and Transmission Pain - the most common “unpleasant” symptom associated with dentistry - protective mechanism for self preservation - warning sign of pathologic condition - ‘relief of pain’ is the primary objective of dentists - ‘removal of the cause of pain’ - ultimate objective - Definition: an unpleasant sensory and emotional experience usually initiated by actual or potential tissue daneumage and transmitted over a coordinated neural network to the CNS, where it is interpreted as pain - sharp, burning aching, cramping, dull or throbbing Dual Components of Pain I. Pain Perception physio-anatomical - in our body involves the generation of an impulse after a stimulus and transmitted to CNS - Impulse is the one running inside the nervous system uniform in all healthy individuals II. Pain Reaction psycho-physiological component that represents an individuals overt manifestation of the unpleasant experience inversely proportional to an individual’s pain threshold - The higher the pain threshold, the lower the reaction to pain is affected by factors like emotional state, fatigue, age, race/nationality, sex/gender, fear and apprehension - fatigue - manifestation of the pain Types of Nerve Cells I. Sensory conducts messages from peripheral tissues to the CNS, that is, the spinal cord and brain responsible for perception of pain, pressure, temperature, taste, etc. specific receptors for each type of sensation - Free Nerve Endings - Pain, Itch, Sickle - Ruffini endings- Stretching of skin, Deep Pressure, continuous touch - Merkel discs - fine touch and pressure - Meissner corpuscle - fine touch, pressure, slow vibration - Hair follicle - crude touch, movement of hairs - Krause bulbs - fast vibration - Pacinian corpuscle - deep pressure II. Motor transmits commands from CNS to periphery i.e. effector organ
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