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Question Video: Recalling the Part of the Brain Responsible for Complex Movements Biology

Humans show a wide range of complex movements, such as being able to use opposable thumbs. Other animals, such as ray-finned fish, do not have such a wide range of movements. Suggest what part of the brain in humans is more developed to allow this difference.

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Video Transcript

Humans show a wide range of complex movements, such as being able to use opposable thumbs. Other animals, such as ray-finned fish, do not have such a wide range of movements. Suggest what part of the brain in humans is more developed to allow this difference. (A) Hypothalamus, (B) frontal lobe, (C) medulla oblongata, (D) parietal lobe, (E) occipital lobe.

This question wants us to identify a brain structure that is more developed in humans and contributes to complex movements such as using opposable thumbs. There are three major developmental divisions of the brain: the forebrain, the midbrain, and the hindbrain. The forebrain is the largest most developed part of the human brain. This is because it consists primarily of the cerebrum and deep brain structures, such as the hippocampus, the seat of memory; optic nerves, which connect to the eyes; and the olfactory bulb, which is necessary for smelling.

In the forebrain, the cerebrum is responsible for reasoning, memory, language, sensory perception, and emotional response. The outermost layer of the cerebrum is called the cerebral cortex. It consists of two identical hemispheres separated by a fissure. Each hemisphere of the cerebral cortex has four lobes: a frontal lobe, a parietal lobe, an occipital lobe, and a temporal lobe.

Of these four lobes in the forebrain, the frontal lobe is extremely important for a number of activities. It is primarily involved in voluntary movement, executive function, the muscle movement in speech production as well as planning and organization skills. The parietal lobe is especially important in the integration of sensory information, such as touch, taste, temperature, and pain.

The occipital lobe is mostly responsible for vision, such as processing information from the eyes and then interpreting this information into the images that create our perception of the world. The temporal lobe is responsible for processing auditory information. It also contains regions responsible for our comprehension of language and many aspects of our memory.

So as we have reviewed, the forebrain is the largest and most developed part of the human brain. And in the forebrain, the frontal lobe is primarily involved in voluntary movement and executive functions. With this information, we’re now able to answer the question. The part of the brain in humans that is more developed to allow a wide range of complex movements is the frontal lobe.

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