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Task 2. Stato-kinetic human reflexes.

The investigated person must sit in rotatory arm-chair, turn his head forward and close his eyes. In such a position horizontal semicurcular channnels are investigated. Then it’s necessary to carry out arm-chair rotation on the right or on the left with the velocity of 5 times in 10 sec (1 turn in 2 sec). Then to stop arm-chair quickly, to ask the investigated person to open his eyes and to observe eyelids movements, how long do they continue. It’s also possible to carry out rotation with head turned on 90° on right or left shoulder or tossed (throwed) back on 60° behind (vertical channels are investigated). To describe investigated reactions, to call receptive fields of investigated reflexes and to indicate closure level of them in CNS.

To take another investigated person, to sit into arm-chair. To propose to turn his head on 30° forward, to perform rotation as in previous investigation, to stop arm-chair and to propose to investigated person to go after rotation directly on straight line forward. To observe movements character.

Task 3. Investigate static and stato-kinetic reflexes in guinea pig.

To put guinea pig to the table, to pay the attention to animal’s pose, head location, moving reactions. To turn over the animal on his back and to lie with his abdomen up. To pay attention to movement character, their order and definite animal pose.

To put guinea pig on board, to raise and to rock the animal, in turn raising board anterior or posterior end. Pay attention to fore-limbs (anterior extremities) status and movement, head status. To put down or to raise the board very fast, while observing anterior extremities status at the beginning and at the end of the movement, animal head status.

To put giunea pig on rotating chair, to perform rotations in horizontal plane to the right or to the left, to pay the attention to animal pose shift in course of movement, to head movement in course of rotation. To indicate, what happens at the rotation beginning and at rotation stoppage.

5. Literature recommended:

1. Lecture course.

2. Mistchenko V.P., Tkachenko E.V. Methodical instructions on Normal Physiology on practical classes for dental and medical students.-Poltava, 2005.-P. 49-50.

3. Ganong W.F. Review of Medical Physiology.-21st ed.-2003.-Section II.

4. Guyton A.C. Textbook of Medical Physiology.-NY, 1992.-P. 636-638.

Materials for self- control:

    1. Control questions:

  1. Midbrain reflectory function.

  2. Vestibular apparatus, irritation conditions for otholitic and ampullar vestibulary receptors.

  3. Decebrational rigidity.

  4. Statho- and statho-kinetic reflexes.

  5. Midbrain role in oral cavity functions regulation.

  6. Midbrain vegetative reflexes.

  7. Midbrain ascendant and descendant conductory ways.

Lesson 15 Cerebellum, diencephalon, subcortex nuclei physiology, their role in organism motor functions regulation

1. The topic studied actuality.

Dentists can get in touch with such cerebellum pathological states: hyperkineses – myoclonuses (fast fascillations of separate muscular groups) of swallowing musculature, soft palate and pharynx wall; speech disorder - scanding- accents are not on necessary syllable but is divided with equal intervals; at circulation disorder in cerebellum (at arteria closure – Vallenberg-Zaharchenko syndrome) – sensitivity is disorded on face, soft palate and vocal cord are paralyzed.

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