THE CEREBELLUM

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THE CEREBELLUM

  • second largest part of brain
  • surface folded into parallel ridges
  • outer ridge is grey matter, inside is white matter which branches to all parts of cerebellum
  • cerebellum exercises control over 1) POSTURE 2) BALANCE 3) FINE COORDINATION OF VOLUNTARY MUSCLE MOVEMENT
  • it does this by recieving info from inner ear (for posture and balance)
  • we could still move without cerebellum however movement would be jerky, uncontrolled and spasmodic

THE HYPOTHALAMUS

  • found in middle of brain
  • concerned with homeostasis (maintaining a constant internal environment)
  • functions of hypothalamus include 1) REGULATION OF AUTONOMIC NERVOUS SYSTEM: heart rate, blood pressure, secretion of digestive juices, movements of the alimentary canal and diameter of the pupil in eye
  • body temoerature
  • food and water intake
  • patterns of waking and sleeping
  • contraction of the urinary bladder
  • emotional responses: fear, anger, aggression, pleasure, contentment
  • secretion of hormones and coordination of parts of the endocrine system via pituitary gland: regulating metabolism, growth, reproduction and response to stress

THE MEDULLA OBLONGATA

  • the medulla oblongata is the continuation of the spinal cord 

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