Manganese enhanced MRI (MEMRI): neurophysiological applications

Area of Science:

• Neuroscience
• Biomedical Imaging
• Biophysics

Background:

• Manganese ion (Mn(2+)) acts as a calcium (Ca(2+)) analog, entering excitable cells via voltage-gated Ca(2+) channels.
• Mn(2+) is paramagnetic, shortening T(1) relaxation times and causing positive contrast enhancement in MRI.
• Manganese-enhanced MRI (MEMRI) was pioneered for studying brain activity, neuronal tracing, and anatomical detail.

Purpose of the Study:

• To review the methodologies and applications of MEMRI.
• To highlight MEMRI's utility in monitoring brain activity in animal models.
• To discuss MEMRI's role in in vivo neuronal tract tracing and assessing axonal transport rates.

Main Methods:

• Utilizing Mn(2+) as an MRI contrast agent.
• Employing MEMRI techniques for functional and anatomical imaging.
• Applying MEMRI for in vivo assessment of neuronal pathways and transport.

Main Results:

• MEMRI provides positive contrast enhancement due to Mn(2+) accumulation.
• The technique allows for detailed visualization of neuronal structures and activity.
• MEMRI is effective for in vivo tract tracing and evaluating axonal transport.

Conclusions:

• MEMRI is a valuable tool for neuroscience research.
• The technique enables detailed study of brain activity and neural connectivity.
• MEMRI facilitates the assessment of axonal transport dynamics in vivo.