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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282X

Arq. Neuro-Psiquiatr. vol.67 no.1 São Paulo Mar. 2009

http://dx.doi.org/10.1590/S0004-282X2009000100011 

Post-traumatic headache

 

Cefaléia após traumatismo cranioencefálico

 

 

Hugo André de Lima MartinsI; Valdenilson Ribeiro RibasII; Bianca Bastos Mazullo MartinsIII; Renata de Melo Guerra RibasIV; Marcelo Moraes ValençaV

IMestre em Neurologia, Universidade Federal de Pernambuco, Recife PE, Brazil (UFPE)
IIMestre em Neurociências, Universidade Federal de Pernambuco, Recife PE, Brazil (UFPE)
IIIGraduada em Psicologia, Universidade Católica de Pernambuco
IVGraduanda em Nutrição, Pós Graduanda em Gestão de Qualidade e Vigilância Sanitária em Alimentos, Universidade Federal de Pernambuco, Recife PE, Brazil (UFPE)
VDoutor em Fisiologia Geral da Universidade de São Paulo, Professor Associado de Neurologia e Neurocirurgia da UFPE

 

 


ABSTRACT

The onset of post-traumatic headache (PTC) occurs in the first seven days after trauma, according to the International Headache Society (IHS) classification. The objective of this study was to evaluate the several forms of headache that appear after mild head injury (HI) and time interval between the HI and the onset of pain. We evaluated 41 patients with diagnosis of mild HI following the IHS criteria. Migraine without aura and the chronic tension-type headache were the most prevalent groups, occurring in 16 (39%) and 14 (34.1%) patients respectively. The time interval between HI and the onset of headache was less than seven days in 20 patients (48.7%) and longer than 30 days in 10 (24.3%) patients. The results suggest that PTC may arise after a period longer than is accepted at the present by the IHS.

Key words: headache, post-traumatic headache.


RESUMO

O início da cefaléia pós-traumática (CPT) ocorre dentro de sete dias após o trauma, de acordo com a classificação da Sociedade Internacional de Cefaléia (SIC). O objetivo deste estudo foi avaliar as diversas formas de cefaléia que surgem após o traumatismo cranioencefálico (TCE) leve e o intervalo de tempo entre o TCE e o início da dor. Foram avaliados 41 pacientes com diagnóstico de cefaléia pós-traumática leve segundo os critérios da SIC. Migrânea sem aura e cefaléia do tipo tensional crônica foram os tipos de cefaléia mais comuns, ocorrendo em 16 (39%) e 14 (34,1%) dos pacientes respectivamente. O intervalo de tempo entre o TCE e o início da cefaléia foi menor que sete dias em 20 pacientes (48%) e maior que 30 dias em 10 (24,3%) pacientes. Estes resultados sugerem que a CPT pode surgir após período maior do que é aceito atualmente pela SIC.

Palavras-chave: cefaléia, traumatismo cranioencefálico.


 

 

Post-traumatic headache (PTH) is usually one of several symptoms of the post-traumatic syndrome1-3. Therefore, may be accompanied by somatic, psychological or cognitive disturbances4-6. The etiology of these symptoms in individuals with mild traumatic brain injury or whiplash injury has been a subject of some controversy with explanations ranging from neural damage to malingering7. The PTH can resemble a tension-type headache, migrainous or cervicogenic headaches7. The pathogenesis of PTH is still not well-known but might share some common headache pathways with primary headaches2. The problem, conversely, arises in PTH after a light trauma, since it is difficult to establish the cause-effect link8. There seems to be an inverse relation between the severity of the head trauma and the occurrence of a PTH, especially the chronic type9. Psychological factors are believed to play a role in the cause, maintenance and relief of chronic PTH.

The evaluation of the person with post-traumatic headache remains a difficult clinical task10. Although most cases of PTH are resolved within 6 to 12 months, many patients have protracted or even permanent headache11. Because PTH usually has no objective findings, it is often controversial whether the symptom is "real," "psychogenic," or "fabricated"11. Although the IHS criteria stipulate that PTH should have an onset within one week of the trauma, it has been observed that a headache linked to the trauma can start later9.

The objective of this study is to characterize the headaches that arise after mild head injury (HI), and to evaluate the time interval between the HI and the headache onset.

 

METHOD

This was a prospective study of patients seen in the Headache Clinic of Pernambuco Federal University from 2004 to 2006. Ninety-five patients after mild HI were assessed. Fifty-four of these patients were excluded due to the presence of headache prior to the HI, inadequate information related to the onset of headache or absence of headache complaint after HI. Of the remaining 41 patients, 22 men and 19 women all met the criteria to the mild HI according to the International Headache Society (IHS) guidelines: HI with loss of consciousness less than 30 minutes or its absence, and the Glasgow scale superior to 13.

All patients presented the neurological exam normal and no complementary exam was realized.

It was performed an initial assessment of all patients, in which it was questioned the main features of headache like: location of pain, duration, precipitant factors, installation way and associated symptoms, being included in the group of migraine, tension-type headache or cluster headache.

After the first interview, each patient included in this study was assessed once for each thirty days, during six months, to appreciate the headache's evolution. It was also researched the time interval between the HI and the headache onset, being all patients divided into four groups according to the following criterion: headache beginning up to 7 days, 7 to 14 days, 14 to 28 days, and over 30 days after the HI. The study was aproved by the Local Ethics Committee and all patients signed an informed consent.

 

RESULTS

Forty-one patients with mild HI who had attended the neurology clinic from 2004 to 2006 were assessed. Figure 1 demonstrates the distribution of data for each type of headache after the HI. The migraine without aura and the chronic tension-type headache were the most prevalent groups, occurring in 16 (39%) and 14 (34.1%) patients respectively, whereas the episodic cluster headache occurred in only one patient (2.4%).

 

 

The interval of time between the HI and the onset of headache is shown in Figure 2.

 

 

The onset of PTH occurred in the first seven days after the HI in 20 (48.7%) patients, whereas 10 (24.3%) patients presented the onset of headache beyond thirty days of HI.

 

DISCUSSION

Post-traumatic headache is a general term for pain localized in the head or neck, occurring after head trauma and varied etiology and pathogenesis12,15. In many cases one only finds a time-dependent relation to trauma, but no causal one. There is no uniform, typical "post-traumatic headache". The headaches are commonly caused by injury to scalp, cervical spine and intracranial structures15-18. It is usually difficult to decide whether the post-traumatic headache is exclusively caused by organic or psychogenic factors. Probably both factors are involved to an individually different degree12,19,20.

In the some authors view, genuine chronic PTH exists only in very rare cases and is always associated with considerable organic intracranial lesions13.

There has been relatively little information dealing with the characteristics of the headache in the post-trauma syndrome14. The data suggested that the majority of patients in the present study had headaches that could be classified by the IHS criteria as episodic or chronic tension-type headache or intermittent migraine.

In this paper, the most common PTH, were migraine without aura and chronic tension-type headache. In a study that assessed 27 patients relating mild HI and chronic headache, these types of headaches were more prevalent too15.

By definition, the headache that develops within one week after head trauma (or within one week after regaining consciousness) is referred to as PTH16. In the first edition of the IHS classification, the time interval between trauma and headache beginning was 14 days, reducing to one week in the last edition. In this paper, a quarter of the patients had symptoms only after thirty days of HI.

Although sensitive fibers imprisonment in lesion point and anomalous regeneration is common in local headache, it may be a part of the explanation for the later beginning of other types of headache like migraine and tension type headache.

Some authors believe that PTH is a brain dysfunction manifestation aggravated by muscle skeletal injury. Acute headache may be provoked by lesion of the scalp tissue. Stimulus in muscle skeletal tissue may provoke neuroplastic alteration in the neuron of caudalis trigeminal nucleus, promoting wind up and sensibilization phenomenon. With continuous stimulus, there is an increased sensitiveness of dorsal corner neuron, provoking an increase of spontaneous activity, reduced threshold of pain and altered processing of afferent stimulus which can explain in part the source and maintenance of PTH12,17.

Trauma event and headache start, must be correlate in time, but as the exact mechanism of start and maintenance of PTH is not known, this time interval must be continuously discussed with the aim of framing the largest number of patients in these criteria, allowing a reasonable treatment.

 

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Received 10 June 2008, received in final form 3 October 2008. Accepted 14 November 2008.

 

 

Dr. Valdenilson Ribeiro Ribas – Avenida Armindo Moura 581 / Quadra D / Bloco 02 / Ap 201 / Conjunto WXL - 51130-180 Recife PE - Brasil. E-mail: ribaspsy@ufpe.br