Category: Neuropsychology

A Stroke of Bad Luck

Business Logo for Psychological and Neuropsychological IssuesThe term “stroke” is a fitting name for a sudden unexpected happenstance.  In medicine the term “stroke” applies to the sudden onset of symptoms after circulatory problems arise in the brain.  The movies typically portray the sudden devastation to one’s physical functioning; for example the paralyzed father in “Legends of the Fall.”  The slow insidious onset of symptoms from circulatory problems is neither as dramatic or pictorial as the sudden manifestation, but it may cause as much or more functional impairment.  The sudden classic middle cerebral artery stroke with left or right paralysis may be diagnosed by many non-professionals.  The slow manifestation is often overlooked or misidentified by professionals.

Neuropsychological and medical training instills the belief that the former type of stroke is much more common than the latter; that the sudden “stroke” is much more common than the slowly evolving cerebral damage from altered circulation.   Given the unique and dramatic symptoms of a stroke are much easier to diagnose than the slowly evolving, it is likely that the figures taught to doctors are less than accurate.  Slowly evolving symptoms of stroke are directly related to uncontrolled high blood pressure.  While one would think that a slowly evolving hemorrhagic stroke (leaking blood vessel) would be more common than a blockage, this does not appear to be the case.   Most hemorrhagic strokes are of sudden onset, and are often difficult to differentiate from a blockage in a cerebral artery.

Most slowly evolving events related to blood pressure present with decreased attention, a decreased level of arousal, and an overall slowing of thoughts and actions.  There may be signs often considered focal or localized; for example speech and visual deficits, but this is hardly universal.  Family history often identifies a day or two where the patient had been inattentive or even partially paralyzed, but the symptoms tended to abate.  I recently interviewed a man with many years of uncontrolled high blood pressure.  The man had refused treatment for high blood pressure because he was convinced the issue was touted by physicians to increase their income.  His family noticed a few days of poor attention and impaired speech a year or two back, but his apparent rapid recovery dissuaded them from seeking medical consultation.  The symptoms returned and abated over a course of years, but the overall picture was of functional decline.  Diagnostic imaging of the brain was not remarkable, yet his performance on neuropsychological tests was indicative of one or more strokes.  As is often the case, one of his arms was significantly stronger than the other, but not affected to the point it was noticeable to the patient or his family.  He lost the power to ambulate as both legs became progressively weaker; not just the one side typically associated with a blockage of a cerebral artery.  Notice that not only were both sides effected, but the damage increased over time.  This is at odds with what most people would consider a cerebral vascular accident.
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Another difficulty in the diagnosis of slowly evolving strokes is the overlap with other conditions.  The sudden dramatic onset of focal paralysis is not present in any other physical condition known to this clinician.  The clinician must differentiate between a stroke and a psychological conversion reaction producing the symptoms, and the latter is fortunately very rare.  The slow onset of bilateral weakness in the legs, as in my patient above, may be secondary to a host of factors other than brain damage.  The unfortunate person may have generalized weakness due to malnutrition, dehydration, anemia, a systemic infection or metabolic/endocrine disorders.  Bilateral weakness in the legs may be secondary to damage in the spinal column, a muscular dystrophy, arthritis or even an unwillingness to walk.  Regardless of age, failure to bear weight on one’s hips and legs quickly leads to muscular atrophy.  The burden on the physician is much greater when the symptoms are not focal and slowly evolving.  It is no wonder that statistics regarding different kinds of strokes may be unavoidably inaccurate.

Given these hurdles experienced by trained professionals, what is an educated layman to do?  The most practical and effective measure is to watch one’s blood pressure.  Over the course of my training and twenty years of practice, I have observed many medical “facts” and “breakthroughs” fall by the wayside for a lack of evidence and efficacy.  The evidence favoring control of blood pressure and its positive effects on health and overall well-being has only increased over the years.  Regardless of age, if you are a female smoker and use birth control, I suggest close monitoring of your blood pressure.  If you are older than 50, I suggest checking your blood pressure regularly; especially important if one has episodes of feeling dizzy and flush.  Please leave comments regarding this post in the space provided below.

Thanks for the Memories

Business Logo for Psychological and Neuropsychological IssuesThanks for the Memories.  This was a song made famous by “Les Brown and his Band of Renown.”  In the 1960’s and 70’s I recall Bob Hope specials on television with Les Brown conducting his signature song.  I was of course a neonate at the time, so my recollection depends upon the generosity of my elders.  Unfortunately, truth be told, I recall these TV specials from childhood and early adolescence.  I was indifferent to his music at the time,  yet I still recall Les Brown’s name and can hum his tune.  What purpose could there be in retaining this trivial information?

Consider memory as a storage house of our five senses.  Smell is strangely the most powerful initiator of old memories, with hearing, touch, taste and vision not far behind.  The greater the interconnection of the senses, the greater the chance of the memory being retained and recalled.  For example, reading about building a model airplane is easily forgotten.  Reading then watching someone else build the plane solidifies the memory.  Actually assisting someone else build the plane after reading and watching further enhances recall and subsequent successful performance.  The auditory memory channel was strengthened by the visual, and locked into place by the motor/tactile.  Each sensory channel leading into the storehouse is strengthened by repetition.  It appears that repetition across days is better at storage than repetition across minutes, or even hours.  Consolidation of memory during sleep may be a factor, but this has yet to be proven.  Two hours of effort-full practice a day over ten years typically leads to mastering nearly any skill.  Like a road or river, the greater flow produces a larger pathway.

Hence, the successful regulation of cell to cell communication by way of gap junction modulation represents a novel approach to the treatment of these two serious conditions and extending the life expectancy of the patient. order cheap viagra In this way, discount levitra Sildenafil boost the sexual stimulation in the central nervous system (brain). So, it is rightly called the viagra free sample . levitra cannot be afforded by all. However, the two weren’t united until relatively recently. viagra store usa “Les Brown & his Band of Renown” were televised every six months to a year; deepening this auditory and verbal memory pathway.  These TV specials were viewed by the whole family, associating other auditory, tactile and visual information with the events.  Not only did the TV specials reflect my personal history, but the unique time in history that served as a backdrop for these specials.  The war in Vietnam took center stage at the time.  Episodic memory refers to the storage and recall of personal events-laughing with the family.  Semantic recall refers to the storage and recall of events that are outside of oneself-the Vietnam war.  Writing an autobiography requires precise episodic recall, whereas playing Jeopardy requires excellent semantic recall.  There is obviously some blurring between these two categories, yet people who suffer with deficits strictly in the episodic or semantic mode are well known.  It is likely that my  recall of the TV specials was enhanced by interconnected personal and historical memories of the events.

Perhaps retaining the memory of “Les Brown and his Band of Renown” was not so trivial after all.  In order to commit any type of information to memory, the use of multiple senses over several days will increase the amount and strength of memory storage.  Linking personal with extra-personal events further solidifies memories into long-term storage.  Memories that remain strong over many years expose their importance.  Many people want to forget strong memories.  Perhaps listening to their call across the years is wiser than ignoring their pleas.  Please leave comments in the space provided below.

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