In the context of studying brain functions, is defined as a treatment that uses a combination of light stimulation and genetics to manipulate the activity of individual neurons.

Explanation:

Optogenetics is the process of manipulating or modulating neuronal activity by using a combination of light and genetic engineering.

By changing the information in the genetic code of the neurons through genetic engineering, scientists develop a special protein in the neurons which can respond to light.

Through this process, optogenetics help in the treatment of stimulating non-functioning neuronal activity in neural circuits.

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explanation:

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.