These next four areas are ‘approximate’ locations. Somatic sensory info is sensory info coming from skin, Most incoming somatic sensory information arrives here. It is also called the PRIMARY SOMATOSENSORY CORTEX. A landmark gyrus just posterior to the central sulcus. Most motor impulses for voluntary muscle contraction begin here as conscious thought. Countless neuron cell bodies, dendrites, and axons form billions of synapses in these ridges. It is also called the PRIMARY MOTOR CORTEX. A landmark gyrus just anterior to the central sulcus. PRECENTRAL GYRUS * (one of many GYRI) (Pronounced “Ji-rus” and “Ji-rye.”) 12 through 12 to identify the location of: Various functions of the brain are known to be localized in specific regions of the cerebral cortex. The superficial gray matter covering each cerebral hemisphere is the CEREBRAL CORTEX.īeing gray matter, what do you suppose it is composed of, mostly? _ Separating frontal lobe from parietal lobe. The pia mater follows every convolution of the brain, clinging tightly to it.ĬENTRAL SULCUS (pronounced “sul-Kus”) is one of the many SULCI. 12.Įach lobe is then subdivided into many ‘valleys’ called sulci (pronounced “sul – sigh”) and ‘ridges’ called (Note how these correspond to the cranial bones.) Fig. LOBES OF THE CEREBRUM:Įach cerebral hemisphere is subdivided into LOBES called: FRONTAL, PARIETAL, OCCIPITAL, and The blood and absorbed CSF eventually flows to the two internal jugular veins in the neck back toward the heart. They do in fact contain venous blood.ĬSF is reabsorbed from the subarachnoid space through structures called arachnoid granulations (a.k.Īrachnoid villi) back into venous blood at these dural sinuses.Īgain, these sinuses are not visible on the models. They are ‘channels’ created by separations of the dura matter and TRANSVERSE SINUS, found in these fissures.
Though not visible on our models there are two DURAL SINUSES, the SUPERIOR SAGITTAL SINUS and the TRANSVERSE CEREBRAL FISSURE - The horizontal separation between the cerebellum and cerebrum. LONGITUDINAL FISSURE - The deep vertical separation between the 2 hemispheres along the Identify the following on the human brain modelsĬEREBRUM * (subdivided into L & R CEREBRAL HEMISPHERES) figs.
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