Biology

Lumbar Vertebrae Definition Lumbar Vertebrae are stacked to form a continuous column in order from superior to inferior. Together they create the concave lumbar curvature…

Cervical Vertebrae Definition Cervical Vertebrae have cylindrical bones that lie in front of the spinal cord and stack up one on top of the other…

About Spinal Cord Definition Spinal Cord is the long, cordlike part of the central nervous system that is enclosed within the vertebral column (spine) and…

Occipital Bone Definition Occipital Bone is the saucer-shaped bone that forms the back part of the skull and part of its base. It is trapezoidal…

Visual Cortex Definition Visual Cortex is the part of the cerebral cortex that receives and processes sensory nerve impulses from the eyes; it is also…

Occipital Lobe Definition Occipital Lobe is the rearmost lobe of each cerebral hemisphere, containing the main visual centers of the brain. It is thus involved…

Temporal Lobe Definition Temporal Lobe is the lobe of each cerebral hemisphere lying to the side and rear of the frontal lobe. The temporal lobe…

Frontal Lobe Definition Frontal lobe is the largest and forwardmost lobe of each cerebral hemisphere, responsible for the control of skilled motor activity, including speech.…

Parietal Lobe Definition Parietal lobe is the upper middle lobe of each cerebral hemisphere, located above the temporal lobe. It is a part of the…

Spinothalamic Tract Definition Spinothalamic Tract is a large ascending bundle of fibers in the ventral half of the lateral funiculus of the spinal cord, arising…

Insular Cortex Definition Insular Cortex (IC) may play a role in the integration of visceral reactions and stress. It is a portion of the cerebral…

Allocortex Definition Allocortex is a part of the cerebral cortex characterized by fewer cell layers than the neocortex, which is also known as heterogenetic cortex.…