What Is The Main Function Of The Parietal Lobe

What Is The Main Function Of The Parietal Lobe – In this post we will discuss the cerebrum, the cerebral cortex layer and the different lobes of the brain along with their function, anatomy and physiology!

The cerebrum is located superior/anterior to the cerebellum and brainstem, and the cerebrum, by definition, functions to integrate sensory stimuli, motor information and perform executive functions.

What Is The Main Function Of The Parietal Lobe

What Is The Main Function Of The Parietal Lobe

The cerebral cortex has 4 main lobes – the frontal lobe, the parietal lobe, the occipital lobe and the temporal lobe – and their position, function and anatomy differ.

A Deeper Look At The Parietal Lobe

All together, the brain contains 6 lobes, the 4 mentioned main ones, plus the insular and limbic lobes.

We will use labeled diagrams and side views of the brain (side views) to walk through each lobe of the cerebrum.

Every EZmed post is filled with simple tricks for memorizing content, and today is no different as you will learn a useful way to remember the main functions of each lobe!

The cerebrum is divided into 2 hemispheres (right and left) by a deep groove known as the longitudinal fissure.

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The two brain hemispheres are connected by the corpus callosum, which allows them to communicate and send information to each other.

The cerebrum has many different functions including memory, cognition, language, thinking, judgment, reasoning, problem solving, decision making, attention, motor control, and sensory processing.

To enable the cerebrum’s many advanced cognitive functions, folds form in the cerebral cortex to increase its surface area within the skull (cranium)—a process known as gyrification.

What Is The Main Function Of The Parietal Lobe

This process creates a larger cortical surface within a smaller space, and as a result, greater cognitive functionality is possible.

Guide To The Human Brain Anatomy And Human Brain Functions Segregated By Lobes. Brain Structure Infographics. Frontal Lobe, Parietal Lobe, Occipital Lobe, Temporal Lobe, Brain Stem, Cerebellum. Royalty Free Svg, Cliparts, Vectors,

The wrinkled structure of the cerebral cortex has peaks called convolutions (singular gyrus) and grooves called sulci (singular sulcus).

Image: The main components of the brain are the cerebrum (in color), the cerebellum and the brainstem. The longitudinal fissure divides the cerebrum into 2 hemispheres (right and left) which are connected by the corpus callosum. Cerebral functions include executive functioning, motor control, and sensory processing. The cerebral cortex has a wrinkled structure with peaks (gyri) and grooves (sulci).

The cerebrum has an outer layer of gray matter, known as the cerebral cortex, surrounding an inner layer of white matter.

Each lobe includes specific cortical areas that perform one or two primary functions of that lobe.

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Image: The cerebrum consists of an outer layer of gray matter, known as the cerebral cortex, surrounding an inner layer of white matter. The cerebral cortex has 4 main lobes: frontal, parietal, occipital and temporal.

The frontal lobe is the largest lobe in the cerebral cortex and is located in the front part of the brain, as the name suggests.

Second, the lateral sulcus (also known as the fissure of Silvius) separates the frontal lobe from the temporal lobe.

What Is The Main Function Of The Parietal Lobe

Image: the central sulcus divides the frontal lobe (blue) and the parietal lobe (yellow). The lateral sulcus (Sylvian fissure) separates the frontal lobe (blue) from the temporal lobe (green).

Understanding The Parts Of The Brain

While the frontal lobe has many different roles, the overall function can be remembered by the word “Action”.

Beginning with “mental operations,” the frontal lobe is responsible for executive functions such as problem solving, planning, judgment, motivation, social behavior, decision making, impulse control, personality, memory, learning, reward, and attention.

Image: The frontal lobe (blue) is involved in “mental actions” or executive functions such as problem solving, decision making, planning, behavior, etc.

In addition to “mental actions,” the frontal lobe is also involved in “physical actions,” including planning, controlling, and executing voluntary muscle movements.

Neurological Bases Of Speech And Language

There are specific cortical areas within the frontal lobe responsible for these executive functions (mental actions) and voluntary motor movements (physical actions).

Just in front of the central sulcus is a gyrus called the precentral gyrus, which is the site of a functional area known as the primary motor cortex.

The primary motor cortex sends motor information down the spinal cord to the skeletal muscles to tell them to move.

What Is The Main Function Of The Parietal Lobe

Generally speaking, as you travel from the medial aspect of the primary motor cortex to the lateral aspect, you will travel from the lower extremities to the upper body.

Parietal Lobe: What Is It, Location, Function, And More

For example, the medial aspect of the primary motor cortex controls voluntary movements of the lower limbs, and the lateral aspect of the primary motor cortex controls voluntary movements of the upper limbs and face.

Furthermore, the left primary motor cortex (left hemisphere) will control most movements on the right side of the body, and the right primary motor cortex (right hemisphere) will control most movements on the left side of the body.

Image: The primary motor cortex (red) is located anterior to the central sulcus on the precentral gyrus and is involved in voluntary muscle movement. The medial aspect of the premotor cortex controls the motor movements of the lower extremities, while the lateral aspect controls the motor movements of the upper extremities and the face.

A common theme you will see among all lobes is that each primary cortex has an association cortex.

What Does The Brain Do? (lobes)

The function of the motor association cortex is the planning and coordination of movements, while the primary motor cortex is more involved in the actual execution of the movement itself.

Image: The motor association cortex (purple) consists of the premotor cortex and the supplementary motor cortex. It is located anterior to the primary motor cortex (red) and is involved in the planning and coordination of voluntary motor movements.

The next functional area is the frontal eye field, and it is involved in the planning, control and execution of eye movements.

What Is The Main Function Of The Parietal Lobe

Image: The frontal eye field (green) is involved in the planning, coordination and execution of eye movements, especially rapid ones.

The Human Brain.

So far, we have mostly focused on the “physical” motor actions of the frontal lobe, and have not discussed the “mental” executive actions.

Broca’s area is usually located in the dominant hemisphere, so for most people this will be the left hemisphere as they are right-handed.

Figure: Broca’s area (orange) is usually located in the dominant hemisphere. It is involved in speech and word formation.

Second, the lateral sulcus (also known as the fissure of Silvius) separates the parietal lobe from the temporal lobe.

Structure And Function Of The Motor Cortex Areas

Image: the central sulcus separates the parietal lobe (yellow) from the frontal lobe (blue). The lateral sulcus (Sylvian fissura) separates the parietal lobe (yellow) from the temporal lobe (green). The parieto-occipital sulcus separates the parietal lobe (yellow) from the occipital lobe (salmon).

The parietal lobe is involved in the conscious awareness of somatic sensations such as touch, pain, pressure, temperature, vibration, etc.

The parietal lobe also plays a key role in processing and analyzing somatosensory information to give meaning and understanding to stimuli.

What Is The Main Function Of The Parietal Lobe

Finally, the parietal lobe is involved in proprioception because it processes sensory stimuli and provides us with awareness of space and body position.

Occipital Lobe: Definition, Functions, And Location

Image: The parietal lobe (yellow) is involved in the awareness, processing, analysis and recognition of somatosensory stimuli such as touch, pain, temperature, pressure, vibration, etc. The parietal lobe also plays a role in proprioception.

Immediately behind the central sulcus is a gyrus called the postcentral gyrus, which is the site of a functional area called the primary somatosensory cortex.

This is similar to the frontal lobe where we had the precentral gyrus just in front of the central sulcus, which was the site of the primary motor cortex.

The primary somatosensory cortex is involved in the conscious awareness of somatic sensations such as touch, pain, pressure, temperature, vibration, etc.

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The periphery sends somatic stimuli up through the spinal cord to the primary somatosensory cortex where we become aware of the stimuli.

The body can be mapped onto the primary somatosensory cortex similar to what we have seen with the primary motor cortex.

The map will look similar in that the medial aspect of the primary somatosensory cortex receives somatic stimuli from the lower extremities and the lateral aspect of the cortex receives information from the upper extremities and the face.

What Is The Main Function Of The Parietal Lobe

Once a somatosensory stimulus reaches the primary somatosensory cortex, we become aware of it, but now we have to process and analyze the stimulus – which will lead us to the next functional area.

Associate Degree Nursing Physiology Review

Image: the primary somatosensory cortex (red) is located posterior to the central sulcus on the postcentral gyrus. It is involved in the conscious awareness of somatosensory stimuli such as touch, pain, temperature, pressure, vibration, etc. The medial aspect of the primary somatosensory cortex receives somatosensory stimuli from the lower extremities, while the lateral aspect receives information from the upper extremities and the face.

Again, we will continue to see a pattern of association cortex with each primary cortex (as we saw in the frontal lobe – primary motor cortex and motor association cortex).

By analyzing, processing and comparing stimuli with old memories, we are able to recognize and understand what a somatosensory stimulus is.

For example, if we close our eyes (so there is no visual stimulus) and add an object such as an apple, we can feel the shape, size, firmness and texture of the apple.

Signs & Symptoms

The somatosensory stimuli from the apple will be compared with old memories of holding the apple before and we will be able to identify the object without looking at it.

The somatosensory association cortex is also involved in proprioception and spatial perception

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