These three areas work together as a team, processing sensory signals from the thalamus – a relay station for information coming from your skin, muscles, and joints.
The primary somatosensory cortex helps you feel things like touch, temperature, and pain.
It also tells you where your body parts are without looking – that’s called proprioception.
It also plays an important role in fine motor control and motor learning by helping coordinate movement based on sensory input.
What is the relationship between the primary somatosensory cortex and the primary motor cortex?
The primary somatosensory cortex helps your brain keep track of where your body parts are during movement and sends feedback to the motor areas to make your movements smooth and coordinated.
This sensory area sits right next to the primary motor cortex, just on the other side of the central sulcus.
Together, they form a team called the sensorimotor cortex, working closely to help you both sense and move your body effectively.
Area 4 – Controlling Movement
Brodmann Area 4 is a part of the brain called the primary motor cortex.
It sits in the frontal lobe and is important because it controls the movements you make on purpose, like picking up a cup or walking.
This area helps start and organize your voluntary movements. It makes sure your muscles work together smoothly when you do things like waving your hand or smiling.
It also helps plan and sequence movements in the right order, so your actions are coordinated and fluid – whether you’re tying your shoes or playing an instrument.
Brodmann Area 4 controls movement on the opposite side of your body. That means the left side of your brain moves the right side of your body, and the right side moves the left.
For example, to move your left leg, the right hemisphere’s motor cortex is activated.
Area 9 – Thinking, Planning, and Decision-Making
Brodmann Area 9 is part of the dorsolateral prefrontal cortex, which sits in the frontal lobe of your brain. It mainly covers parts of the middle and superior frontal gyri.
