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Alien hand syndrome following corpus callosum infarction: A case report and review of the literature

  • Authors:
    • Xiaoyu Gao
    • Bing Li
    • Wenzheng Chu
    • Xuwen Sun
    • Chunjuan Sun
  • View Affiliations

  • Published online on: August 22, 2016     https://doi.org/10.3892/etm.2016.3608
  • Pages: 2129-2135
  • Copyright: © Gao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Alien hand syndrome (AHS) is characterized by involuntary and autonomous activity of the affected limbs, and consists of the frontal, callosal and posterior AHS variants. The callosal subtype, resulting from damage to the corpus callosum, frequently features intermanual conflict. However, infarction of the corpus callosum is rare due to abundant blood supply. The present study reported a case of AHS (callosal subtype, in the right hand) caused by callosal infarction. Infarction of the left corpus callosum was confirmed with magnetic resonance imaging. In addition, magnetic resonance angiography and digital subtraction angiography examinations revealed multiple lesions in the feeding arteries. Subsequent to antiplatelet therapy for 2 weeks following admission, the patient gradually recovered. Furthermore, the current study reviewed 31 previously reported cases of AHS following callosal infarction in the literature.

Introduction

Alien hand syndrome (AHS) is a rare clinical syndrome; using the Mayo Clinic Medical Records Linkage System, Graff-Radford et al (1) identified 150 patients with alien limbs within the Department of Neurology between January 1, 1996, and July 11, 2011. Numerous medical and surgical conditions can cause AHS, such as cerebral infarction, cerebral hemorrhage, corticobasal degeneration, epilepsia partialis continua, Alzheimer's disease, progressive supranuclear palsy and Creutzfeldt-Jakob disease (29). However, there are few reports about the pharmacologic or rehabilitation treatment of AHS. Experience with pharmacologic treatment of AHS has been limited to platelet aggregation inhibitors (10,11). In addition, the rehabilitation treatment of AHS is lacking in the literature (1214). Pooyania et al (14) identified that being educated about the diagnosis of AHS and the use of compensatory strategies (visualization, distraction of affected limb and maintaining a slow/steady pace during activities) decreased the frequency of patient's AHS movements (14).

AHS is a movement disorder characterized by involuntary and autonomous movements. AHS can be divided into three variants, including the frontal, callosal and posterior AHS subtypes (5,15). The callosal subtype is characterized by intermanual conflict (antagonizing movements of the two hands), mostly due to the disconnection between the two cerebral hemispheres (16). The blood supply to the corpus callosum is ample; thus, infraction in this area is rare. The present study reports a case of callosal-subtype AHS presenting following corpus callosum infarction. In addition, the current case was compared with a collection of 31 previously reported cases of AHS that were caused by callosal infarction.

Case report

A 56-year-old woman presented at the Yantai Yuhuangding Hospital (Yantai, China) in November 2011 with involuntary and autonomous activity of the right hand that persisted for 1 month, without apparent cause. Intermanual conflict was the most troubling feature experienced. For instance, the patient's right hand took off her clothing while she attempted to dress with the left hand. The patient also reported weak right limb and dysarthria. She had a history of hypertension, coronary artery disease and type 2 diabetes mellitus, but no substance abuse history, including smoking and drinking. No similar disease or syndrome was reported for any family members. Written informed consent was obtained from the patient.

Physical examination failed to revealed anepia, anarthria, autotopagnosia or apraxia. No signs of meningeal irritation were observed. In addition, an ophthalmic examination failed to reveal any abnormalities, whereas a slightly superficial right nasolabial fold was detected. Muscle tension was normal, with level-5 muscle force in the right upper extremity and level-4 in the right lower extremity (17). Sensory, finger-to-nose and left heel-knee-shin tests were normal. However, the heel-knee-shin test on the right side was unsuccessful. Deep tendon reflex was normal, with no pathological signs. The mini-mental state examination (MMSE) score was 30 (18).

Doppler color imaging demonstrated atherosclerotic plaques in bilateral carotid arteries and increased resistance in bilateral vertebral arteries. Cranial magnetic resonance imaging (MRI) displayed long T1 and T2 signals, as well as high signals on diffusion weighted imaging (DWI), in the body and splenium of the left corpus callosum (Fig. 1). Brain magnetic resonance angiography (MRA) 3 days following admission revealed extensive atherosclerosis and intermittent visualization of the basilar artery (Fig. 2A). Cerebral digital subtraction angiography (DSA) of the right or left internal carotid artery showed the opening of the corresponding posterior communicating artery. Furthermore, bilateral posterior cerebral arteries and basilar artery apex were visualized. The left anterior cerebral artery and left pericallosal arteries appeared faint. The right vertebral artery was narrow, and the distal segment of the intracranial branch was occluded. In addition, the intracranial branch of the left vertebral artery and basilar artery was significantly narrowed (Fig. 3). A diagnosis of callosal AHS was established based on the aforementioned observations. The characteristic features of callosal AHS reported in the present patient included involuntary autonomous movement, and intermanual conflict. Infarction of the corpus callosum was clearly demonstrated in MRI scans, while MRA and DSA revealed multiple lesions in the feeding arteries.

The patient was treated with aspirin enteric coated tablets (100 mg, qd; Bayer AG, Leverkusen, Germany) atorvastatin calcium (20 mg, qn; Pfizer), amlodipine besylate tablets (5 mg, qd; Pfizer, Inc., New York, NY, USA) and metformi (500 mg, bid; Bristol-Myers Squibb, New York, NY, USA) during the 2-week hospital stay, and continued to receive the same treatment until the last visit in March 2015. No stroke recurrence was observed.

Discussion

Frontal AHS is characterized by forced grasping of objects and impulsive reaching and groping movements toward nearby objects within the visual field. This type of AHS is typically caused by lesions located in the anterior corpus callosum, the supplementary motor area, the anterior cingulate gyrus and the medial prefrontal cortex of the dominant hemisphere. By contrast, callosal AHS typically results from a callosal lesion and is characterized primarily by intermanual conflict and apraxia of the non-dominant limb (5). Posterior AHS is characterized by the feeling of an alien hand and left hemianesthesia, which lesions primarily in the cortex or subcortical structures, such as the thalamus, parietal lobe and medial temporal lobe that are supplied by the posterior cerebral artery (10,12,13,15). The current study reported a case with characteristic features of callosal AHS, including involuntary autonomous movement, as well as intermanual conflict. Infarction of the corpus callosum was clearly demonstrated according to the imaging results.

In the present study, a search of the PubMed database (www.ncbi.nlm.nih.gov/pubmed) was performed (keyword, alien hand syndrome) in order to identify previous AHS cases presenting after callosal infraction. The search yielded 23 studies reporting 31 cases of AHS following callosal infarction between 1990 and 2014 (5,1940). These callosal infarction cases were divided into simple corpus callosum infarction and complex corpus callosum infarction. Simple corpus callosum infarction was defined as infarction occurring in the corpus callosum alone; complex corpus callosum infarction was defined as corpus callosum with involvement of other brain sites.

The search yielded a total of 31 previous AHS cases, with 7 cases of simple corpus callosum infarction (22.6%) and 24 cases of complex corpus callosum infarction (77.4%). As shown in Table I, the corpus callosum was affected on the left side in 10 out of the 31 cases (5,19,2530) and on the right side in 17 cases (20,21,2527,3140). Both sides of the corpus callosum were affected in 4 cases (20,2224), all of which presented simple corpus callosum infarction (Table I). In complex corpus callosum infarction cases, the majority of lesion sites included the medial frontal cortex (16/24; 66.7%), the anterior cingulate gyrus (7/24; 29.2%) and the supplementary motor cortex (3/24; 12.5%).

Table I.

Summary of reported cases of alien hand syndrome presenting following simple and complex callosal infarction.

Table I.

Summary of reported cases of alien hand syndrome presenting following simple and complex callosal infarction.

A, Simple callosal infarction (n=7)a

Studies NcSymptomsRef.
Unilateral (left)
  Verleger et al IC(19)
Unilateral (right)
  Suwanwela and Leelacheavasit 2IC, PC(20)
  Nicholas et al GR, SR(21)
Bilateral
  Muangpaisan et al IC, agonistic dyspraxia, mirror movement(22)
  Lin et al IC of left hand, GR of right hand(23)
  Yuan et al IC, AH sign(24)
  Suwanwela and Leelacheavasit 1IC, PC, mirror movement(20)

B, Complex callosal infarction (n=24)b

StudiesNcConcurrent infarctionSymptomsRef.

Unilateral (left)
  Feinberg et al Medial frontal lobeIC, GR(5)
  Goldberg and Bloom2, 4Medial surface of frontal lobeIC and GR, or GR only(25)
  Giroud and Dumas7Centrum ovaleGR(26)
  Chan and Ross1Mesiofrontal cortexIC(27)
  Biran et al Mesial frontal cortexIC, GR, PC(28)
  Jang et al Anterior portion of left cingulate gyrusGR, compulsive manipulation(29)
  Nowak et al1Paramedian periventricular white matter and paramedian cortexIC, GR(30)
  Nowak et al (30)2Anterior of corpus callosum and overlying white matterGR(30)
Unilateral (right)
  Tanaka et al Anterior third cingulate gyrus, lower or medial superior frontal gyrusIC(31)
  Goldberg and Bloom1Medial frontal gyrusIC, GR, SR(25)
  Goldberg and Bloom3Medial frontal lobeGR(25)
  Gottlieb et al2Multiple lacunae (both cerebral hemispheres)IC(32)
  Doody and Jankovic6Internal capsule lacunaLE, PE(33)
  Trojano et al1Frontomesial region extending to anterior cingulate gyrusIC, GR, SR, AH sign(34)
  Giroud and Dumas8Internal frontal areaGR(26)
  Chan et al Right anterior cingulate gyrus, supplementary motor area, medial prefrontal cortexIC, GR, SR, leg symptoms(35)
  Chan and Ross2Mesial prefrontal cortex, anterior cingulate gyrus, supplementary motor cortexIC, GR(27)
  Chan and Ross3Anterior cingulate gyrus, prefrontal cortex, partial supplementary motor cortexGR(27)
  Ay et al Thalamus, hippocampus, inferior temporal lobe, occipital lobeAH sign, PE(36)
  Ong Hai and Odderson Mesial frontal cortex, right anterior cingulate gyrusIC, GR, PC, involuntary masturbation(37)
  Bejot et al Bilateral medial frontal lobesGR, involuntary masturbation(38)
  Espinosa et al Parietal areaMirror movement(39)
  Park et al2Frontal lobeIC(40)

a Infarction at the corpus callosum only

b concurrent infarction at other sites of the brain apart from the corpus callosum

c order of the case if the article reported several cases. IC, intermanual conflict; GR, grasp reflex; AH, alien hand; LE, levitation; PE, personification; SR, self-restriction.

Major AHS symptoms included intermanual conflict (19/31; 61.3%), grasp reflect (19/31; 61.3%) and alien hand signs (3/24; 12.5%). Among the 7 patients with simple corpus callosum infarction, intermanual conflict occurred in 6 cases (85.7%), while grasp reflex was seen in 2 cases (28.5%). Among the 24 patients with complex corpus callosum infarction, intermanual conflict was reported in 13/24 (54.2%) patients, while grasp reflex was observed in 17 cases (70.8%). Within the 17 grasp reflex patients, 14 (82.3%) had infarction at the medial frontal cortex, cingulate gyrus or supplementary motor cortex. In addition, 2/24 (8.3%) complex corpus callosum infarction cases were reported to experience involuntary masturbation.

As shown in Table II, 16 (51.6%) (19,24,25,27,3033, 3538) out of the 31 included cases presented disappearance or significant alleviation of AHS symptoms during the follow-up (between several days and 15 months), while no improvement was observed in 4 cases (5,21,27,34) for at least 6 months. In the remaining 11 cases (20,22,23,25,26,28,29,39,40), the outcome was unknown.

Table II.

Outcomes of reported cases of AHS presenting following simple and complex callosal infarction (n=31).

Table II.

Outcomes of reported cases of AHS presenting following simple and complex callosal infarction (n=31).

AuthorsNaDurationAHS symptomsRef.
Feinberg et al11 yearAbsence(5)
Verleger et al115 monthsDecrease(19)
Suwanwela and Leelacheavasit2N/AN/A(20)
Nicholas et al18 monthsAbsence(21)
Muangpaisan et al1N/AN/A(22)
Lin et al1N/AN/A(23)
Yuan et al12 weeksDecrease(24)
Goldberg and Bloom41 year, 7 months, N/ADecrease(25)
N/AN/A
Giroud and Dumas2N/AN/A(26)
Chan and Ross36 and 3 monthsDecrease(27)
6 monthsAbsence
Biran et al1N/AN/A(28)
Jang et al1N/AN/A(29)
Nowak et al228 and 37 weeksDecrease(30)
Tanaka et al17 monthsDecrease(31)
Gottlieb et al1Next few monthsDecrease(32)
Doody and Jankovic1Within daysDecrease(33)
Trojano et al111 monthsAbsence(34)
Chan et al16 monthsDecrease(35)
Ay et al12 weeksDecrease(36)
Ong Hai and Odderson17 weeksDecrease(37)
Bejot et al12 weeksDecrease(38)
Espinosa et al1N/AN/A(39)
Park et al1N/AN/A(40)

a Number of cases in each study. AHS, alien hand syndrome; N/A, information not available (inconclusive or missing).

In general, the literature search revealed that the lesion was complex in the majority (77.4%) of cases. Intermanual conflict was more common in simple corpus callosum infarction patients (85.7%), and grasp reflex was more frequently reported in complex corpus callosum infarction patients (70.8%). Involuntary masturbation seems to be unique to infarction of the right anterior corpus callosum (37,38). Table I also suggests that the right hemisphere is more frequently involved, since the right and left sides of the corpus callosum were affected in 17 and 10 patients, respectively.

The corpus callosum is a fiber plate that conveys information between the two cerebral hemispheres (41). Callosal AHS putatively arises from failure in connection between the motor area and the supplementary motor area in the two cerebral hemispheres (16,23). Damage to the corpus callosum may manifest as frontal or callosal AHS. Mixed AHS has been also reported following corpus callosum infarction (24), in which the symptoms include intermanual conflict (as in callosal AHS), feeling of an alien hand and hemianesthesia (as in posterior AHS that involves the thalamus, parietal lobe or medial temporal lobe) (10,12,13,15).

Table I indicates that infarction of the corpus callosum typically occurs with lesions to other sites, including the medial frontal cortex, anterior cingulate gyrus and supplementary motor cortex. Similar to the genu and body of the corpus callosum, these regions all receive blood supply from the anterior cerebral artery. By contrast, the splenium of the corpus callosum receives blood from the posterior cerebral artery (42). Infarction at the splenium of the corpus callosum is reportedly caused by embolism, whereas atherosclerotic cerebral infarction is the more common form of infarction in the genu and body of the corpus callosum (43). The corpus callosum receives blood supply from the anterior and the posterior cerebral arteries with extensive anastomosis, and thus is rarely affected by infarction (42). In the present case, MRA and cerebral angiography revealed extensive atherosclerosis throughout the intracranial vasculature, notably in the left anterior cerebral and the vertebral basilar arteries. These imaging findings suggested the presence of atherosclerotic lesions in the anterior and posterior circulation.

AHS tends to be transient in patients with partial loss of the corpus callosum genu and splenium; in addition, patients with unilateral callosal lesions may regain connectivity between the two hemispheres if the remaining corpus callosum is functional (44). Permanent AHS may develop when the infarction involves two thirds of the anterior corpus callosum (45). Quick recovery was noticed following antiplatelet therapy in the present case, suggesting that the remaining corpus callosum may have compensated for the lesioned site, and that connectivity between the bilateral cerebral hemispheres was re-established.

In conclusion, the present study reported a prototypic case of callosal AHS, which was apparently caused by compromised anterior and posterior circulation. A notable issue in this case is insufficient blood supply of the vertebra-basilar arteries and the left anterior cerebral artery. This finding highlights the need for comprehensive investigation of the cerebral vasculature in patients with AHS caused by infarction of the corpus callosum.

Acknowledgements

The authors would like to thank the patient for her participation in the present study. The present study was funded by the Yantai Science and Technology Development Plan (grant no. 2013ws220).

Glossary

Abbreviations

Abbreviations:

AHS

alien hand syndrome

MRA

magnetic resonance angiography

MRI

magnetic resonance imaging

MMSE

mini-mental state examination

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Gao X, Li B, Chu W, Sun X and Sun C: Alien hand syndrome following corpus callosum infarction: A case report and review of the literature. Exp Ther Med 12: 2129-2135, 2016
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Gao, X., Li, B., Chu, W., Sun, X., & Sun, C. (2016). Alien hand syndrome following corpus callosum infarction: A case report and review of the literature. Experimental and Therapeutic Medicine, 12, 2129-2135. https://doi.org/10.3892/etm.2016.3608
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Gao, X., Li, B., Chu, W., Sun, X., Sun, C."Alien hand syndrome following corpus callosum infarction: A case report and review of the literature". Experimental and Therapeutic Medicine 12.4 (2016): 2129-2135.
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Gao, X., Li, B., Chu, W., Sun, X., Sun, C."Alien hand syndrome following corpus callosum infarction: A case report and review of the literature". Experimental and Therapeutic Medicine 12, no. 4 (2016): 2129-2135. https://doi.org/10.3892/etm.2016.3608