Cart

Shuhan He MD Administrator
Shuhan He MD is an Emergency Medicine Physician at Harvard Emergency Medicine Department at the Massachusetts General Hospital. Dr. He is interested in making better tools to Conduct Science, especially regarding scientific outcomes. He is the founder of MazeEngineers.com, Conductscience.com, Sciencen.com and an array of tools to help scientists get the job done better and with more translation to the patient at the bedside.
follow me
×
Shuhan He MD Administrator
Shuhan He MD is an Emergency Medicine Physician at Harvard Emergency Medicine Department at the Massachusetts General Hospital. Dr. He is interested in making better tools to Conduct Science, especially regarding scientific outcomes. He is the founder of MazeEngineers.com, Conductscience.com, Sciencen.com and an array of tools to help scientists get the job done better and with more translation to the patient at the bedside.
follow me
Latest Posts

Coordination of movements refers the performance of purposeful movements carried out smoothly by different groups of muscles. For this to occur, the motor, sensory and cerebellar systems need to be intact. Loss of coordination is called ataxia which is of two types: sensory and cerebellar. There are several tests which can be done to assess coordination. Sensory ataxia is due to the loss of sense of position. Hence the coordination tests become worse when the patient closes their eyes. Otherwise, sensory ataxia is compensated through vision. In cerebellar ataxia, the closure of eyes has no effect at all.

Finger-nose Test

  1. Ask the patient to touch the tip of their nose and your finger alternately with their index finger. This has to be done rapidly and repeatedly.
  2. Your finger should be kept at a distance that makes the patient extend their full arm to reach it.
  3. The test should be performed with the patient’s eyes being open.
  4. Each arm should be tested separately.
  5. To further increase the sensitivity of the test, you can keep changing the position of your arm.
  6. In order to check for sensory ataxia make the patient close their eyes and then touch the tip of their nose.

A normal person will be able to perform these tasks seamlessly. If there is a problem with coordination, it will result in overshooting.

Finger-to-finger Test

  1. Ask the patient to extend and abduct their arms fully and then bring the tips of their index fingers together after making a wide circle. This should first be done with eyes opened and then with eyes closed.
  2. Another test for coordination is to ask the patient to make circles in the air at first with eyes open and then with eyes closed.

A normal person will be able to perform these tasks seamlessly. If there is a problem with coordination, it will result in overshooting.

Heel-to-knee Test

  1. The patient should be lying down.
  2. Ask the patient to place their heel on their opposite knee and slide it downwards along the shin to the ankle.
  3. Then lift their heel, make a semicircle and place it again on their knee and repeat the movement.
  4. Repeat with the other heel doing the same movements on the opposite knee.

The movements will be clumsy and jerky in loss of coordination.

Tandem Walking

  1. Ask the patient to walk along a straight line so that the heel of one foot comes directly in contact with the toes of the other foot.
  2. The rear foot is then advanced so that its heel is then placed in front of the foot which was previously the front foot.

A patient with cerebellar dysfunction is unable to do so and tends to fall towards the diseased side.

Romberg's Sign

This helps to differentiate between sensory and cerebellar ataxia. Ask the patient to stand with their feet close together. A patient with sensory ataxia is steady when eyes are open and becomes unsteady when they close their eyes. A patient with cerebellar ataxia will be equally unsteady with eyes open or closed.

Involuntary Movements

Tremors

These are rhythmic, involuntary movements resulting in alternating contractions and relaxation of groups of muscles. To check for tremors ask the patient to outstretch their arms and abduct their fingers. If the tremors are still not obvious but are suspected, place a piece of paper on the dorsum of the hand and observe its movements. There are different causes of tremors, and they all present with different types of tremors.

Anxiety: the tremors are fine and become obvious only when the arms are outstretched, and fingers are spread. Hands will be cold and sweaty.

Thyrotoxicosis: tremors are similar to those of anxiety, but hands are sweaty and warm.

Essential familial tremors: tremors are coarse and present during rest and activity.

Senile tremors: these are similar to essential familial tremors but only occur in old age.

Parkinsonian tremors: these are slow and coarse and are pill-rolling movements. They disappear during voluntary work and sleep.

Intention tremors: ask the patient to hold an object. The tremors will occur during voluntary work but disappear at rest. These are the features of cerebellar dysfunction.

Flapping tremors: ask the patient to outstretch arms and dorsiflex hands at wrists. Jerky movements of the hands occur due to flexion and extension of the wrists and fingers. Flapping tremors can be caused by the respiratory, renal, hepatic or cardiac failure.

Tics or Habit Spasms

These are repetitive and stereotyped movements with the same movement being repeated again and again.

Choreiform Movements

These are semi-purpose movements which look like fragments of normal movements but are repeated in a disorderly manner. These occur in Huntington’s chorea and rheumatic fever (Sydenham’s chorea).

Athetoid Movements

These are slow writhing movements which primarily affect the distal parts of the limbs.

Myoclonus

These are the sudden shock like contractions that involve one or more muscles or a whole limb. These are usually features of epilepsy.

Hemiballismus

There are sudden, violent, throwing movements of the limbs on one side. They occur due to the lesion in the contralateral subthalamic nucleus.

Dystonic Movements

These are similar to the athetoid movements but involve the proximal parts of the limbs or trunk. These are also called torsion spasms. Spasmodic torticollis (in which repetitive rotatory movement of the head and neck to on side occurs) and dystonia musculorum deformans are examples of torsion spasms.

Gait

Spastic Gait

The patient doesn’t lift his/her feet off the ground completely so that the toes remain in contact with the ground. Legs swing outward and forward in a circular fashion. This is seen in UMN paraplegia. In hemiplegic gait, only one leg is affected.

High Stepping Gait

Patients lift their feet high to clear the toes from the ground and then return it with a loud slapping noise. This is seen in patients with bilateral foot drop as a result of the weakness of the extensors of the feet, as in polyneuropathy.

Drunken Gait

Patients walk on a broad base in a reeling manner. This occurs in the cerebellar lesion.

Waddling Gait

The body sways from side to side as each step is taken. It occurs in proximal muscular weakness, as in myopathies. It also occurs in congenital dislocation of hip joints.

Parkinsonian Gait

A patient with Parkinsonism bends forward with flexion at the hips and knees. Arms are flexed at the elbows and adducted at the shoulder. There are no associated movements during walking.  The patient makes rapid shuffling movements with their feet dragging against the floor.