POL SCI 2 Lecture Notes - Lecture 5: Sclera, Glossopharyngeal Nerve, Rete Mirabile
Document Summary
Identify the important external and internal features of the brain: explain the principle functions of the various subdivisions of the brain, cerebrum: telencephalon. Voluntary control: corpus callosum: band of nerve fibers joining the two hemispheres, septum pellucidum: separates lateral ventricles, thalamus: relays sensory information and center for pain perception, midbrain: mesencephalon. Central part of brainstem: colliculus: swelling on roof of midbrain (caudal for hearing) rostral for vision, pons: links midbrain and m. o, cerebellum: coordinates and regulates muscle activity, medulla oblongata: controls heart and lungs. Brain circulation, meninges, csf: describe the important features of the arterial supply of the brain. Internal carotids (regress to fibrous strands in ruminants and cats: vertebral anastomosing branch (major channel in cattle runs through vertebral column so isn"t severed when throat is cut. Contains loose ct, veins and lymphatics (cranial dura is fused with periosteum: dura matter (outer) (sclera is a continuation dura, contains venous sinuses.
