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Awon Lor Central Nervous System (Cerebrum (Lobes (Parietal Lobe (It is…
Awon Lor Central Nervous System
Cerebrum
Gyri
Post-central gyrus
It is the location of the primary somatic sensory cortex where it is consciously aware of general somatic sensation and awareness of objects and body parts
Pre-central gyrus
It is the location of the primary motor cortex where it enacts the movement of the eyes and help with the production of speech, and other cognitive function like thinking
Lobes
Parietal Lobe
It is deep to the parietal one where it is surrounded by the central sulcus, lateral sulcus, and is where the postcentral gyrus is located
Occipital Lobe
It is deep to the occipital bone and is the most posterior part of the cerebrum. It is also where the visual cortex is located
Frontal Lobe
It is deep to the frontal bone and ends at the central sulcus. It is also where the precentral gyrus is located.
Temporal Lobe
It is deep to the temporal bone and is later to the cerebrum. It holds the Olfactory cortex and the Auditory cortex. It also contains the function of objects, words, and face recognition.
Insula
It is the primary cortex for gustation and general visceral sensation
Broca's area
It is located on the left side of the frontal lobe and controls the motor movement of speech
Wernicke area
It is where speech comprehension is located
Tracts
Commissural tract
One hemisphere to another
Projection tract
Ascending and descending fiber axon
Association tract
Connects part of the cortex to the same hemisphere
Diencephalon
Thalamus
It is a paired structure that is composed of several nuclei that connects all sensory signals, except for olfactory, to the cortex
Hypothalamus
It is inferior to the thalamus. It controls the automatic nervous system and helps regulate body temp., hunger and thirst, and the sleep cycle.It is also involve with motivational behaviors and emotions
Epithalamus
It consist of nuclei and pineal gland. The pineal gland secretes melatonin
Cerebellum
Function
Its function is to adjust posture to maintain equilibrium.
Cerebellar Peduncles
Superior Peduncle
Connects the cerebrum to the mid brain and then to the cerebellum
Middle Peduncle
Connects the cerebrum to the pons and then to the cerebellum
Inferior Peduncle
Connects the medulla oblongata to the cerebellum
Brain stem
Mid brain
It is inferior to the diencephalon and superior to the pons
Pons
It is between the mid brain and the medulla oblongata. It contains a motor function and allows a bridge between the brain stem and the cerebellum
Medulla Oblongata
It is the most inferior part of the brain stem and contains the pyramid where decussation occurs (crossing over of cerebral hemispheres)
Spinal cord
Conus Medularis
It is the tapered end of the spinal cord
Cauda Equina
It is a collection of nerve roots at the inferior end of the vertebral canal
Filum Terninale
It is a long filament of connective tissuesthat starts from the conus medularis
Roots
Posterior roots
Contains axons of visceral and somatic sensory neurons
Anterior roots
Contains axons of visceral and somatic motor neurons
CNS Protection
Mening
Dura mater
It is tough, dense, fibrous connective tissues
Arachnoid mater
Contains the subarachnoid space and blood vessels
Pia mater
It is very thin and contains vascular layer
Epidural Space
It is filled with fat and is only located in the spinal cord
Subarachnoid Space
It is between the spinal cord and the dural, and is filled with cerebral spinal fluid
Dural Sinuses
It is a blood filled space and contains oxygen poor blood