more-neurons

Giv­en the grow­ing media cov­er­age men­tion­ing the terms Cog­ni­tive Reserve and Brain Reserve, you may be ask­ing your­self, “What exact­ly is my Cog­ni­tive (or Brain) Reserve?”

The cog­ni­tive reserve hypoth­e­sis, test­ed in mul­ti­ple stud­ies, states that indi­vid­u­als with more cog­ni­tive reserve can expe­ri­ence more Alzheimer’s dis­ease pathol­o­gy in the brain (more plaques and tan­gles) with­out devel­op­ing Alzheimer’s dis­ease symptoms.

How does that work? Sci­en­tists are not sure but two pos­si­bil­i­ties are considered.
1. One is that more cog­ni­tive reserve means more brain reserve, that is more neu­rons and con­nec­tions (synaps­es) between neu­rons. Indi­vid­u­als with more synaps­es would then have more synaps­es to lose before the crit­i­cal thresh­old for Alzheimer’s Dis­ease is reached.
2. Anoth­er pos­si­bil­i­ty is that more cog­ni­tive reserve means more com­pen­sato­ry process­es. The brain of indi­vid­u­als with more cog­ni­tive reserve would use more alter­na­tive net­works to com­pen­sate for the dam­ages caused by the pathol­o­gy in pre­vi­ous­ly used networks.

In a new­ly pub­lished study, Roe and col­leagues from Wash­ing­ton Uni­ver­si­ty in St. Louis, used the num­ber of years of edu­ca­tion as a mea­sure of cog­ni­tive reserve. Why years of edu­ca­tion? Because pre­vi­ous stud­ies have shown that peo­ple who have more edu­ca­tion also exhib­it a greater resis­tance to Alzheimer’s symp­toms, even while patho­log­i­cal changes are occur­ring in the brain (see Ben­nett el al., 2003 or Roe, Xiong, et al., 2008).

Roe and her col­leagues stud­ied 198 indi­vid­u­als whose mean age was 67. Out of these 198 indi­vid­u­als, 161 were non­de­ment­ed and 37 were diag­nosed with Alzheimer’s Disease.

All the par­tic­i­pants in the study took a [Read more…] about Edu­ca­tion builds Cog­ni­tive Reserve for Alzheimers Dis­ease Protection