BIOM2071 Lecture Notes - Lecture 2: Postcentral Gyrus, Precentral Gyrus, Medial Longitudinal Fissure
Document Summary
Nervous system: regulates many aspects of health and disease, works in milliseconds. Neurological disorders: brain injury or stroke, depression, anxiety, mental illness, epilepsy/seizures, headaches and migraines, alzheimer"s, parkinson"s, dementia and memory loss. Overview of nervous system: central nervous system: brain and spinal cord, pain, paraesthesia or itching, carpal tunnel syndrome, addiction, paralysis. Integrates signals and performs higher cognitive functions: peripheral nervous system: sensory (afferent) and motor (efferent) divisions, connects cns to peripheral organs (cranial and spinal nerves and ganglia) Cerebrum: functions: sensation, conscious thought/intellect, memory and complex movements, sulci and gyri (ridges and groves, grey matter = superficial, white matter = deep, paired cerebral hemispheres (separated by longitudinal fissure) Lobes: frontal: motor area (voluntary movement, parietal: somatosensory area (proprioception, temporal: auditory cortex, occipital: visual cortex, central sulcus: separates frontal and parietal lobes, precentral gyrus: primary motor cortex, postcentral gyrus: primary sensory cortex. Cerebral atrophy: common feature of many brain diseases.
