Part 3 - Part 2
Without our Brain Lobes life wouldn't be quite as exciting as it is. Let's undo a few bolts and have a closer look to find out why.
The Cerebral Hemispheres are divided into four pair of Lobes by Fissures, deep, narrow openings given wonderfully romantic names such as the Fissure of Sylvius, which separates the Frontal and Temporal Lobes.
Or the Fissure of Rolando, separating the Frontal and Parietal Lobes.
The remaining Lobe is known as the Occipital Lobe.
The four Lobes of each Hemisphere are named in reference to the position they occupy in the Cranium. (Skull)
As well as separating the Lobes, the Fissures also serve to increase the surface area of the Brain. The greater the surface area the more Neurons can be packed in.
The more Neurons the greater the potential intelligence available.
It is this potential intelligence that Personal Development is most interested in.
Used here to illustrate the depth of the Fissure of Rolando, this image of the Human Brain can also serve as a gentle reminder that whilst outwardly it may resemble a boxing glove, it packs an infinitely more powerful problem solving punch than any violent fist.
folds of the Brain Mass constituting the Lobes, are termed
Gyri. The groove on either side of a Gyrus is
termed Sulcus, and as with Fissures,
Sulci serve to increase Brain surface area.
Gyri and Sulci are the plural form of Gyrus and Sulcus.
A Sulcus is not as deep as a Fissure.
These Frontal Lobes, of which the Prefrontal Lobes form a part, are engaged in the higher Mental and Intellectual aspects of Being. Including Conscious awareness, self awareness, Conscious thinking, intuition, guiding of emotion, personality, imagination, reflection, concentration, voluntary action, speech and language.
The Temporal lobes, perched above the ears, containing the Primary Auditory Cortex, is the sound processing center of the Brain structure. Other duties involve assisting the Occipital Lobe to form images, and it also plays a part in Memory, Language, and Semantics.
The Parietal, the second largest of these four major Lobes, processes physical sensations and feelings such as Tactile (touch, pressure), temperature, pain, pleasure, the ability to perceive limb movement and position, electric shock etc.
Situated behind the Frontal, and above the Temporal Lobes, in each Hemisphere, the Parietal communicates with every part of the body via the Somatosensory Cortex, which shares it's location alongside the Fissure of Rolando with the Motor Cortex. Rolando is also dubbed the Central Sulcus.
The Occipital Lobe, commonly known as the Visual Cortex, located at the rearmost, lower, part of the Cerebrum, near the Occipital Bone of the Cranium, basks in the importance of the sole role of taking care of everything ocular.
Even though processing vision appears to be the Occipital Lobes' only function, it executes this function with much interaction with other parts of the Brain.
Somatosensory refers to communication between the Body and Brain.
Somatosensory also refers to the Sensory Systems that relay any of the type of sensations and feelings mentioned above, from any part of the body, via the Peripheral Nervous System, to a specific area of the Somatosensory Cortex, dedicated to that particular body part.
The Motor Cortex is on call to stimulate any of the muscles involved in executing voluntary movement.
In common with it's Sensory Cortex neighbor, it too, has an individual dedicated region for every part of the body it is in communication with, and, likewise, executed via the Peripheral Nervous System.
In addition to performing their specific Motor or Sensory function, each of the Brain Lobes form part of an immense association network that combines perception and experience into a presentation that we can (hopefully) make sense of. It is this associative networking that gives us an integrated view of our Environment.
Human Brain Lobes Rock!
Part 3 - Part 2