What is the difference between supratentorial and infratentorial area?
The sheet of dura mater (one of the layer of covering of the brain) which separates cerebral (esp occipital lobe, which is present on the inferior side of cerebral cortex) and cerebellum aka little brain, is known as cerebellum are tentorium. Above it is called as supratentorial and below is infratentorial area.
What is infratentorial lesion?
Infratentorial lesions. The lesions are clustered in the superior portion of the ventrolateral nucleus of the thalamus and the suprathalamic white matter Small capsular lesions involving the most lateral portion of the ventrolateral nucleus of the thalamus, and multiple bilateral lacunae in the basal ganglia, can be attended by gait impairment.
What is infratentorial superficial siderosis?
Infratentorial superficial siderosis, commonly identified as superficial siderosis, is a disabling degenerative disorder affecting the brain and spinal cord.
What is involved in infratentorial involvement of the cerebellum?
Infratentorial involvement was evaluated with respect to the whole cerebellum, along with the part of the brainstem between the occipital foramen and the upper edge of the red nucleus. The presence of callosal lesions was also investigated via assessment of the portion of the CC included between the 2 external walls of the lateral ventricles.
What is supratentorial and infratentorial?
In anatomy, the supratentorial region of the brain is the area located above the tentorium cerebelli. The area of the brain below the tentorium cerebelli is the infratentorial region. The supratentorial region contains the cerebrum, while the infratentorial region contains the cerebellum.
What does supratentorial mean?
(SOO-pruh-ten-TOR-ee-um) The upper part of the brain that contains the cerebrum, ventricles (fluid-filled spaces), choroid plexus, hypothalamus, pineal gland, pituitary gland, and optic nerve. Examples of tumors that form in the supratentorium are glioblastomas, pineal region tumors, and ependymomas.
What does supratentorial problem mean?
A word used by doctors and nurses to imply that a patient's problems are all in their mind. The tentorium is a membrane just under the brain, so “supratentorial” refers to what is above that, namely the brain.
Is thalamus supratentorial or infratentorial?
The cerebral hemispheres along with the basal ganglia and thalamus are located within the supratentorial compartment. The cerebellum and brain stem are located within the infratentorium which is also called the posterior fossa.
Is the pituitary infratentorial?
The supratentorial area contains the cerebrum, lateral ventricle, third ventricle, choroid plexus, hypothalamus, pineal gland, pituitary gland, and optic nerve. The posterior fossa/infratentorial area contains the cerebellum, tectum, fourth ventricle, and brain stem (pons and medulla).
What is tentorium cerebelli?
The tentorium cerebelli, the second-largest dural reflection, is a crescent-shaped dura fold that extends over the posterior cranial fossa, separating the occipital and temporal cerebral hemisphere from the cerebellum and infratentorial brainstem [1,6].
What structures are infratentorial?
The posterior fossa/infratentorial area (the lower back part of the brain) contains the cerebellum, tectum, fourth ventricle, and brain stem (midbrain, pons, and medulla).
Where is a supratentorial lesion?
The supratentorial region consists of the part of the brain that lies above the tentorium cerebelli. It consists of two cerebral hemisphere, ventricles and blood vessels.
What is a supratentorial stroke?
Introduction. Sudden onset of unilateral limb weakness or facial droop represents the hallmark of acute supratentorial stroke and is attributed to ischemia or infarction of contralateral projection of corticospinal tracts supplying the ipsilateral face and limbs.
What is white matter in the brain?
White matter is found in the deeper tissues of the brain (subcortical). It contains nerve fibers (axons), which are extensions of nerve cells (neurons). Many of these nerve fibers are surrounded by a type of sheath or covering called myelin. Myelin gives the white matter its color.
Where is supratentorial white matter?
These ventral fibers run along the anterior median fissure of the spinal cord and do not go further than the cervical level of the spinal cord.
What is infratentorial part of brain?
In anatomy, the infratentorial region of the brain is the area located below the tentorium cerebelli. The area of the brain above the tentorium cerebelli is the supratentorial region. The infratentorial region contains the cerebellum, while the supratentorial region contains the cerebrum.
Is the basal ganglia supratentorial?
The major supratentorial structures are the cerebral hemispheres, basal ganglia, thalamus, hypothalamus, and cranial nerves I (olfactory) and II (optic).
Is the temporal lobe supratentorial?
The temporal lobes are located in the supratentorial region of the brain. The supratentorial region of the brain is area located above the tentorium cerebelli.
Is pons supratentorial or infratentorial?
Anatomy. The brain is divided into supratentorial and infratentorial compartments by the tentorium cerebelli. The supratentorial compartment includes the cerebral hemispheres and the sellar, pineal, and diencephalic regions, whereas the infratentorial compartment includes the midbrain, pons, medulla, and cerebellum.
Is the hypothalamus infratentorial?
Note 1: The following subsites coded to C71. 0 are INFRAtentorial: hypothalamus, pallium, thalamus. The following subsites coded to C71. 8 are SUPRAtentorial: corpus callosum, tapetum.
What passes through the Tentorial notch?
Midbrain passes through the tentorial notch and this notch provides the only communication between the supratentorial and infratentorial compartments. The area between the brainstem and free tentorial edge is divided into the anterior, middle, and posterior incisural spaces.
Where in the brain is the tentorium?
the cerebellumThe tentorium cerebelli (Latin for "tent of the cerebellum") is an invagination of the meningeal layer of the dura mater that separates the occipital and temporal lobes of the cerebral hemispheres from the cerebellum and brainstem.
What drains into the straight sinus?
The straight sinus, also known as tentorial sinus or the sinus rectus, is an area within the skull beneath the brain. It receives blood from the inferior sagittal sinus and the great cerebral vein, and drains into the confluence of sinuses. Dural veins (Straight sinus labeled as 'SIN.
What part of brain is the cerebellum?
The cerebellum (“little brain”) is a fist-sized portion of the brain located at the back of the head, below the temporal and occipital lobes and above the brainstem. Like the cerebral cortex, it has two hemispheres.
What is a supratentorial stroke?
Introduction. Sudden onset of unilateral limb weakness or facial droop represents the hallmark of acute supratentorial stroke and is attributed to ischemia or infarction of contralateral projection of corticospinal tracts supplying the ipsilateral face and limbs.
What is the supratentorial white matter?
Eloquent brain function emerges from the coordinated activity of multiple cortical and subcortical brain regions; the white matter defines a supporting network for the efficient transfer of information of these regions within and between cerebral hemispheres.
What is supratentorial craniotomy?
Supratentorial craniotomy means the exposure of any part of a cerebral hemisphere over the basal line joining the nasion to the inion.
Is the temporal lobe supratentorial?
The temporal lobes are located in the supratentorial region of the brain. The supratentorial region of the brain is area located above the tentorium cerebelli.
What happens when the cerebellum is involved in infratenorial atrophy?
While when cerebellum is involved ie cerebellar atrophy ie infratenorial atrophy, mostly your balance and muscle coordination will be effected.
What is non-difuse cortical atrophy?
That said, things quickly become tricky when you start to consider non-difuse (“focal” regions of) cortical atrophy. These are specific regions of cortex that have shrunken more than the cortex in the rest of the brain. Sometimes this means that although the overall cortex is smaller when compared to the scan of an adult in their 30–40s, there is one (or a few) regions of the brain that are MUUCHHH smaller (“out of proportion”) than the rest. The potential causes of this are endless but the two categories that come to mind are neurodegenerative disorders including Alzheimers, or encephalomalacia (usually from a prior stroke but also surgery or congenital).
What is the term for damage to the frontal lobe?
Frontal lobe atrophy refers to damage to the frontal cortex, found covering the anterior part of the brain. Cerebral atrophy could include cortical atrophy, but, because cerebral refers to the entire cerebral hemisphere, the damage could occur anywhere in the sub-cortical regions as well.
What is the term for the destruction of neurons and glial cells?
First of all, where the brain is concerned, atrophy refers to cell destruction, that is the death of neurons and glial cells. Cortical atrophy could refer to damage occurring anywhere in the cerebral cortex, that is, the outer 6 layers of cells covering each cerebral hemisphere.
