A theory called the left-dominant brain immune network states that certain brain areas form a network that dominates interaction with the body's immune system. This theory has recently been supported by a study in which people with an injury to the left side of their brain were found to be at greater risk for acquiring a hospital acquired infection during their inpatient rehabilitation program.
The study looked at the medical records of 163 patients with either left or right brain injury. The researchers found that 61% of the left brain injury patients developed an infection within the first few days as an inpatient.
Left brain injury may not only put an immediate immune risk on a person, but possibly a long-term vulnerability as well. People who suffer an injury to the left side of their brain should therefore be carefully monitored for potential infection.
Frisina PG, Kutlic AM, & Barrett AM. Left brain injury associated with more hospital-acquired infections during inpatient rehabilitation. Archives of Physical Medicine and Rehabilitation. (December 2012.)