Cerebrum Flashcards
Occupies the entire visceral cranium
CEREBRUM/FOREBRAIN
Is a deep fissure or groove that lies directly under the sagittal suture of the skull and passes from front to back. It divides the Cerebrum into 2 halves, the (R) Cerebral hemisphere and (L) cerebral hemisphere.
Longitudinal Fissure
Fibers pass across from one hemisphere to the other in the inferior part below the fissure to form the
Corpus Callosum
A fold of Dura mater, the outer brain covering called the
Falx Cerebri
Each Cerebral Hemisphere is completely divided into 5 lobes by deep grooves or fissures:
- Frontal Lobe – lies deep to the frontal bone on each side.
- Parietal Lobe – lies under the Parietal bone.
- Temporal Lobe – lies under the
Temporal bone - Occipital Lobe – lies under the Occipital bone.
- Insula – lies deep in the brain substance.
– lies between the frontal and parietal lobes on both sides.
- Central Fissure
– lies between the frontal and parietal lobes above and below the Temporal lobe.
- Lateral Fissure
– lies between the two occipital lobes and the Cerebellum below.
- Transverse Fissure
Forms a small part of the brain that lies on the under surface and rest upon the Sphenoid bone.
MIDBRAIN
– which is seen on its undersurface and are composed of nerve fibers passing from the cerebrum to the hindbrain and spinal cord.
Cerebral Peduncles
– are four additional prominences on the upper surface of the Midbrain.
Quadrigeminal Bodies
Is the most caudal of the 3 primary brain vesicles
HINDBRAIN
– lies below the Midbrain, in front of the Cerebellum and above the Medulla which has a prominence in front due to nerve fibers passing from ½ of the Cerebellum to the other.
Pons
– is much larger and occupies the posterior cranial fossa, deep to the occipital bone and lies behind the Pons and are separated from the occipital lobe by the transverse fissure.
Cerebellum
– lies below the Pons just above the Foramen Magnum which has a nerve fibers passing through it and connecting the brain and spinal cord.
Medulla Oblongata