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Alien hand syndrome (AHA):
abnormal involuntary motor behaviors

Prevalence in general population (GP): extraordinary rare [~0.0001% | 1:1 | weight: 1,00]

Alien hand syndrome (AHS - a.k.a. 'anarchic hand syndrome') is a an extremely rare condition that occurs in patients with brain injury; it has also been described in stroke subjects, after callosotomy, and in corticobasal degeneration.

Most likely diagnostic options for Alien hand syndrome (ranked by 'weight' for the general population):


• stroke [~0,09% | 1:1K | weight: ~0,9?]
• brain tumor [?% | 1:10K | weight: ?]
• condition after brain surgery [?% | 1:20K | weight: ?]
• Alzheimer's disease [?% | 1:100 | weight: ?]
• Creutzfeldt-Jacob disease [?% | 1:2K | weight: ?]



[1st figure = prevalence hand sign in condition | 2nd
figure = prevalence condition in GP | 3rd figure =
estimated hand sign weight for condition relative
to GP (>0,5 = present in majority of GP cases]
The Alien Hand Syndrome:

Quick summary:
alien hand syndrome is usually a condition resulting from brain injury, often with the corpus callosum, frontal- or posterior lobe problems.

[For every 100 Alien hand syndrome cases in the general population (GP) you can expect to find about 90 stroke cases, etc.]

NOTICE: Keep in mind that every single hand sign always bares the potential
to have an association with multiple psychology- and/or health related themes;
a solid assessment always requires a consideration of hand sign combinations!

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