10 **Question: How does blood flow to the brain change from during and after the speech?**- ○ Cerebral blood flow was lower during the speech than after- ○ Cerebral blood flow was higher during the speech than after- ○ Cerebral blood flow has not changedThis question focuses on understanding the variations in cerebral blood flow in relation to speaking activities.

The brain is divided into four major regions such as cerebrum, diencephalon, cerebellum, and brainstem. Each part of the brain has a specific structure and function. Each structure is crucial for the normal functioning of the body. The function of the brain is very complex and is involved in many functions. The right and left carotid arteries and the right and left vertebral arteries are involved in supplying blood to the brain. Cerebral blood flow is the delivery of arterial blood to the brain. It helps the brain to receive the required oxygen and nutrients like glucose to the brain. Research suggests that during speech, there is an increase in the flow of blood to Broca's region of the brain than after speech. Broca's region is found in the frontal lobe and is associated with the production of speech. Studies also suggest that the lowering of the cerebral blood flow to the Broca's region results in stuttering. Thus, option b is the correct answer. Cerebral blood flow supplies energy substrates to the brain. Thus, during the speech, there is an increase in cerebral blood flow to be brain occurs to meet the energy demands. Thus, a lowering of cerebral blood flow cannot occur during speech than after speech. Thus, option b is incorrect. Depending upon the requirement, the blood flow changes. Thus, when the requirement of the functioning of the Broca's region, then changes in the blood flow are observed. Thus, option c is incorrect.