Anencephaly is a condition that prevents the normal development of the brain and the bones of the skull. The corpus callosum is a structure that connects the right and left sides of the brain. New questions in Science. Absence of facial sweating (anhidrosis). The septum pellucidum (SP) is a thin membrane located at the midline of the brain between the two cerebral hemispheres, or halves of the brain. Specifically, a thin membrane called the septum pellucidum is missing from its normal position in the middle of the brain. Anencephaly is a serious birth defect in which a baby is born without parts of the brain and skull. It is connected to the corpus callosum -- a collection of nerve fibers that connect the cerebral hemispheres. This condition results when a structure called the neural tube fails to close during the first few weeks of embryonic development. Heating coal in the absence of air is called destructive distillation. As the neural tube forms and closes, it helps form the baby’s brain and skull (upper part of the neural tube), spinal cord, and back bones (lower part of … Most often it starts between the ages of 4 and 15 years. It contains 200 million nerve fibers that pass information back and forth. Name the term: the most malignant type of astrocytoma, composed of spongioblasts, astroblasts, and astrocytes; it usually occurs in the brain but may occur in the brain stem or spinal cord. It is caused by defective neuronal migration during the 12th to 24th weeks of gestation resulting in a lack of development of brain folds and grooves (). A child with repeated absence seizures is said to have childhood absence epilepsy or petit mal epilepsy. During an absence seizure, these electrical signals repeat themselves over and over in a three-second pattern. Dysfunction or absence of this structure can result in a condition known as split-brain syndrome, in which each hemisphere of the brain functions independently. Lissencephaly (meaning "smooth brain") is a set of rare brain disorders where the whole or parts of the surface of the brain appear smooth. Horner's syndrome is distinguished from physiological anisocoria by instillation of a drop of 4% cocaine: in physiological anisocoria, this results in dilation, whereas it doesn't where there is a Horner's syndrome. It is a type of neural tube defect (NTD). A seizure is a burst of uncontrolled electrical activity between brain cells (also called neurons or nerve cells) that causes temporary abnormalities in muscle tone or movements (stiffness, twitching or limpness), behaviors, sensations or states of awareness. In people who have seizures, the brain's usual electrical activity is altered. The brain's nerve cells normally send electrical and chemical signals across the synapses that connect them. The neural tube is a layer of cells that ultimately develops into the brain … The neural tube is a layer of cells that ultimately develops into the brain … Split-brain syndrome is associated with conditions such as alien-hand syndrome, which is characterized by involuntary and uncoordinated yet purposeful movement of the hands. wbbse board activity task latest for class 10 please help and I will select you as a brain list acids do not show acidic behavior in the absence of water Anencephaly is a condition that prevents the normal development of the brain and the bones of the skull. Enophthalmos. This condition results when a structure called the neural tube fails to close during the first few weeks of embryonic development. Seizures are not all alike. The absence of the septum pellucidum is a rare condition that affects the structure of the brain. 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