First Aid 2012 (page 451) said hyperreflexia but the newest errata says hyporeflexia. At least from my google search, it seems that hyporeflexia is true,,, but in the diagram for B12 deficiecny, corticospinal tract is damaged with gray matter of anterior horn spared... which makes me think that it's an UMN lesion...which should result in hyperreflexia.
Does anyone know the mechanism by which B12 deficiency results in hyporeflexia? Or is first aid errata wrong to say that B12 deficiency causes hyporeflexia?
Does anyone know the mechanism by which B12 deficiency results in hyporeflexia? Or is first aid errata wrong to say that B12 deficiency causes hyporeflexia?