Question | Answer |
3 Major parts of the brain | cerebrum (cerebral hemispheres), brainstem (core of brain), cerebellum (little brain) |
corpus collosum | fiber bundle that connects cerebral hemispheres. Allows to transfer of info |
gray matter | cerebral cortex, neuron cell bodies, folded |
gyri | ridges of cerebral cortex |
sulci | grooves of cerebral cortex |
white matter | contains axons - myelinated = white |
What divides the lobes of the cerebrum? | Sulci and fissures |
Frontal lobe | motor |
parietal lobe | sensory |
temporal lobe | auditory |
occipital lobe | visual |
insula | pull temporal lobe down to see, integrates nervous activity |
Broadman's areas | specific areas responsible for certain functions |
Primary motor Broadman's area | (4), precentral gyrus |
primary sensory Broadman's area | (3,1,2) postcentral gyrus |
Hearing Broadman's area | (41,41) temporal lobe |
Visual Broadman's area | (17,18,19) perception and identification of images |
Broca's Area | (44,45) speech. In hemisphere opposite handedness |
Wernicke's Area | (22) understand and compose the written word ... dyslexia |
Hounculus | bigger area = need more neurns to control. Lower extremity in midsagital section |
The brain is supplied by _____ major pairs of blood vessels. Name them | 2. Internal carotid (2 branches), Vertebral arteries |
Circle of Willis | Branches of the Internal vertebral and internal carotid blood vessels unite on inferior surface of brain |
Middle cerebral artery | branch of internal carotid. Supplies lateral surface |
Blockage of middle cerebral artery would affect... | the upper limb |
Anterior cerebral artery | branch of internal carotid. Supplies medial surface of brain |
Blockage of anterior cerebral artery would affect... | the lower limb |
Veins draining the brain empty into... | dural venous sinuses = folds in dura |
Dural venous sinuses go to... | internal jugular vein |
CSF in produced within... | the choroid plexus.. this is in cavities of the brain called ventricles |
Arachnoid granulations | CSF drains into before dural sinuses |
Path of CSF | choroid plexus in Lateral ventricle, third ventricle, cerebral aqueduct, fourth ventricle, subarachnoid space surrounding brain and spinal cord |
Hydrocephalis | accumulation of CSF perhaps due to excessive production or blockage |