Draw a digramofhuman brain and explain as function
Answers
CEREBRUM ANATOMY
The cerebrum is based in two complex hemispheres segregated into five paired lobes. Responsible for higher brain function, which includes the interpretation and reception of the nerve impulses, initiating voluntary movement, memory, thought processes, and logical reasoning, the cerebrum is also highly involved in emotional response and instinctual response.
CEREBRUM STRUCTURE
The cerebrum is easy to recognize as it is the largest and most obvious section of the human brain. Located in the telencephalon region, the cerebrum takes up about 80% of the brain’s mass.
A longitudinal fissure segregates the right cerebrum hemisphere from the left. A large tract of white brain matter is responsible for internal connection. This white brain matter is known as the corpus collosum. Extending into the longitudinal fissure which segregates the two hemispheres, the falx cerebri is a relative connection of the menenges.
Each individual hemisphere is equipped with a central cavity which is known as the lateral ventricle and is lined with epindymal cells. These cavities are also filled with cerebral spinal fluid. Two distinct layers comprise the cerebrum. The cerebral cortex is the outer layer created by gray matter of 2 to 4 millimeters in thickness. Just below the gray matter surface is the white matter layer. Convolutions, the vast complex array of folds and wrinkles along the brains surface, are formed during the development of a fetus. During this developmental stage, the brain size is known to increase at an alarming rate and the gray matter cortex outgrows the underlying white matter, leaving the folds and wrinkles on the brain’s surface.
CEREBRUM DIAGRAM
Cerebrum
Image: Cerebrum
The folds which are elevated from the brain’s surface are called the cerebral gyri. The grooves created by these folds are alternatively called the cerebral sulci. The overgrowth of the gray matter of the brain during fetal development effectively increases the surface area of the brain to three times the size it would otherwise be. These additional folds are then laden with nerve cell bodies.
CEREBRUM LOBES
The cerebrum is first divided in half, each considered a lobe. From there, each lobe is then again divided creating five lobes on each hemisphere. Fissures create the subdivisions, four of which are found on the cerebrum’s surface. Each subdivided lobe is named for the cranial area, particularly the bone, which is responsible for its protection. The divisions are each responsible for their own specific function.
CEREBRUM LOBES DIAGRAM
Cerebrum Lobes
Image: Cerebrum Lobes
FRONTAL LOBE
The frontal lobe can be found in the foremost section of the brain, on each hemisphere. Segregating the frontal lobe from the parietal lobe is a deep furrowing fissure known as the central sulcus, or alternatively the fissure of Rolando. Extending out at right angles from the longitudinal fissure, it meets with the lateral sulcus. The lateral sulcus in alternatively named the fissure of Sylvius, and protrudes laterally to segregate the frontal lobes from the temporal lobes. Just in front of the central sulcus, the precentral gyrus is responsible for vast amounts of motor skills. The frontal lobe is vital in performing functions such as large motor skills and skeletal movement, developing personality, and providing analysis of sensory experiences. I