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Understanding Migraine through the Lens of Maladaptive Stress Responses: A Model Disease of Allostatic Load  David Borsook, Nasim Maleki, Lino Becerra,

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Presentation on theme: "Understanding Migraine through the Lens of Maladaptive Stress Responses: A Model Disease of Allostatic Load  David Borsook, Nasim Maleki, Lino Becerra,"— Presentation transcript:

1 Understanding Migraine through the Lens of Maladaptive Stress Responses: A Model Disease of Allostatic Load  David Borsook, Nasim Maleki, Lino Becerra, Bruce McEwen  Neuron  Volume 73, Issue 2, Pages (January 2012) DOI: /j.neuron Copyright © 2012 Elsevier Inc. Terms and Conditions

2 Figure 1 Migraine Frequency and Allostatic Load
Migraines may be episodic or chronic based on the number of headache days per month. With increasing frequency, there are increasing effects on brain function and structure. These changes reflect increasing allostatic load. Neuron  , DOI: ( /j.neuron ) Copyright © 2012 Elsevier Inc. Terms and Conditions

3 Figure 2 Migraine Attacks
The effects of migraine attacks relate to frequency (top panels), pre- and postictal processes, and ongoing effects of these ictal and peri-ictal challenges. Differences in the temporal nature and magnitude of these challenges drive the allostatic state, probably as a result of overactivity and dysregulation of glutamate, GABA, and glucocorticoids, among other mediators. Allostatic challenges may be considered continuous (type 1), intermittent of short duration (type 2), and intermittent of long duration (type 3). Type 1 may include ongoing processes, such as the increased excitability of cortical and subcortical structures; type 2 would include the actual ictal event: pain and associated symptoms. An example of type 3 are the premonitory symptoms, which include a wide and heterogeneous collection of cognitive, psychological, and physical changes preceding and forewarning of an attack by a few hours to 2–3 days. At least one premonitory symptom is reported in over 85% of patients, and over 70% of patients reported two or more; the most frequently reported premonitory symptoms include fatigue (46.5%), phonophobia (36.4%), yawning (35.8%), decreased concentration (51%), and stiff neck (Giffin et al., 2003; Schoonman et al., 2006). Neuron  , DOI: ( /j.neuron ) Copyright © 2012 Elsevier Inc. Terms and Conditions

4 Figure 3 Migraine and Criteria for Allostatic Load
Four major processes contribute to allostatic load in migraine: (1) migraine attacks produce repeated stress; (2) the brain fails to habituate to stimuli; (3) dysregulation of normal adaptive responses, in which components of the stress response may fail to shut down normally, occurs; and (4) compensatory increased responses may occur (e.g., photophobia) during ictal and interictal states. All of these processes act on the brain system to increase the allostatic load. The process is further aggravated by the bidirectional effects of migraine on systemic processes that contribute to alterations in brain processing. Neuron  , DOI: ( /j.neuron ) Copyright © 2012 Elsevier Inc. Terms and Conditions

5 Figure 4 Migraine and Allostatic Effectors
The figure summarizes multiple actions on the brain in migraine. The relative contribution of each “effector” to allostatic load is unknown but may be additive or cumulative over time. “Effectors” may have a continuous (e.g., genetic contributions), episodic (e.g., pain), or progressive (e.g., white matter lesions and stroke) effect. Neuron  , DOI: ( /j.neuron ) Copyright © 2012 Elsevier Inc. Terms and Conditions

6 Figure 5 Migraine Disease State and Increasing Allostatic Load
The figure shows examples of increased burden of disease as a consequence of increased migraine frequency. The changes affect both brain and body processes. Disease burden may be defined as the personal cost of migraine in terms of medical, economic, social, financial, personal, or family costs. Neuron  , DOI: ( /j.neuron ) Copyright © 2012 Elsevier Inc. Terms and Conditions

7 Figure 6 Modification of Allostatic Overload through Multiple Targeted Effects on Stressors that Modulate Specific Brain Systems The figure shows how multiple targeted treatments may contribute to migraine regression. The relative effects of target-specific treatments may have complete, complementary, or no effect on various migraine symptoms. Taken together, these decrease an overall severity score. Neuron  , DOI: ( /j.neuron ) Copyright © 2012 Elsevier Inc. Terms and Conditions

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