BIO 12 Lecture Notes - Lecture 5: Posterior Cerebral Artery, Adrenocorticotropic Hormone, Speech-Language Pathology
14 Sep 2020
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Document Summary
Composed of midbrain, pons and medulla oblongata. Contains two (2) respiratory centers that promote normal rhythm of breathing. A bulb-shaped structure found between the pons and the spinal cord containing various nuclei for vital functions. Regulates autonomic, involuntary functions such as breathing, heart rate, and blood pressure. Reflex centers - for coughing, sneezing, swallowing and vomiting. If a person sees a wasp flying toward him, he ducks or twists away (visual reflex) Turning the head (hear) to a sound (auditory reflex). Assists in the regulation of skeletal motor movement and spinal reflexes. Filters incoming sensory information to the cerebral cortex. Reticular-activating system - controls the sleep-wake cycle and consciousness. The brain receives 750 to 900 ml of blood flow per minute. The vertebral arteries and the internal carotid arteries provide the arterial supply to the brain. The vertebral arteries join to form the basilar artery. The basilar artery bifurcates to form 2 posterior cerebral arteries.
