Answer:
Your brain is responsible for nearly all functions of your body and for interpreting sensory information from the world around you.
Your brain has many parts but speech is primarily controlled by the largest part of the brain, the cerebrum.
The cerebrum can be divided into two parts, called hemispheres, which are joined by a band of nerve fibers called the corpus callosum.
Your speech is typically governed by the left side of your cerebrum. In about a third of people who are left-handed, however, speech may actually be controlled by the right side.
Parts of the brain involved in speech
In recent decades, there has been an explosion of research into language processing in the brain. It’s now generally accepted that the control of speech is part of a complex network in the brain.
The formation of speech requires many different processes, from putting thoughts into words, forming a comprehensible sentence, and then actually making the mouth move to make the correct sounds.
There are several areas of the brain known to play a role in speech:
Cerebrum
Each hemisphere of the cerebrum can also be divided into regions called lobes, which include the frontal, parietal, temporal, and occipital lobes.
The lobes located in the front and side of your brain, the frontal lobes and the temporal lobes, are primarily involved in speech formation and understanding.
Broca’s area
Broca’s area is located in the front part of the left hemisphere of your brain. It has an important role in turning your ideas and thoughts into actual spoken words. Broca’s area has been found to be most activeTrusted Source right before you speak.
Broca’s area also helps to pass the information to another part of your brain called the motor cortex, which controls the movements of your mouth. It’s named after French doctor, Pierre Paul Broca, who discovered the region of the brain in 1861.
Wernicke’s area
Wernicke’s area is mainly involved in the understanding and processing speech and written language. Wernicke’s area was first discovered by Karl Wernicke in 1876. It’s located in the temporal lobe, just behind your ears. The temporal lobe is also the region where sound is processed.
Arcuate fasciculus
The arcuate fasciculus is a band of nerves that connects Wernicke’s area and Broca’s area. It helps you form words, speak clearly, and understand concepts in language form.
Cerebellum
The cerebellum is located at the back of your brain. The cerebellum is involved in coordinating voluntary muscle movements like opening and closing your mouth, moving your arms and legs, standing upright, and maintaining balance. It also controls language processing.
A review published in the American Journal of Speech-Language Pathology suggests that the cerebellum is actually more important to language processing than previously thought.
Motor cortex
To speak clearly, you must move the muscles of your mouth, tongue, and throat. This is where the motor cortex comes into play.
Located in the frontal lobe, the motor cortex takes information from Broca’s area and tells the muscles of your face, mouth, tongue, lips, and throat how to move to form speech.
Step-by-step explanation: