Classification and pathophysiology of headache
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Classification and pathophysiology of headache

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Classification and pathophysiology of headache Classification and pathophysiology of headache Presentation Transcript

  • International Classification of Headache Disorders (ICHD) Headaches Primary Secondary
  •  A headache that is not caused by another underlying disease,trauma or medical condition. Accounts for about ninety percent of all headaches. secondary headache Caused by exogenous disorders
  •  TENSION TYPE HEADACHE MIGRAINE CLUSTER HEADACHE ATYPICAL FACIAL PAIN TRIGEMINAL NEURALGIA BENIGN PAROXYSMAL
  •  Ice pick Ice cream Exertional Cough Chronic paroxysmal hemicrania SUNCT(Short-lasting unilateral neuralgiform head ache with conjunctival injection and tearing)
  •  Intracerebral bleeding Raised intracranial pressure Infection Inflammatory disease Post-herpetic neuralgia Referred pain from other structures
  •  Stimulation of primary nociceptors Lesions in pain-producing pathways of PNS&CNS
  •  Scalp Middle meningeal artery, Dural sinuses, Falx cerebri & Proximal segments of the large pial arteries
  •  The ventricular ependyma, choroid plexus, pial veins, and much of the brain parenchyma are not pain-producing.
  • Key structures involved Large intracranial vessels and dura mater Peripheral terminals of the trigeminal nerve that innervate these structures Caudal portion of the trigeminal nucleus, which extends into the dorsal horns of the upper cervical spinal cord and receives input from the first and second cervical nerve roots (the trigeminocervical complex) Pain modulatory systems in the brain that receive input from trigeminal nociceptors
  •  Trigeminal nerve First 3 cervical nerves Fascial nerve Glossopharyngeal and vagus nerve
  •  Distension,traction or dilatation of i/c or e/c arteries. Traction or displacement of large intracranial veins or their envelope. Meningial irritation & raised ICT.
  •  Compression ,traction or inflammation of cranial or spinal nerves. Spasm ,inflammation & trauma to cranial & cervical muscles. Disturbance of intracerebral serotonic projection/activtn of brain stem structures.