Paralyzed Monkeys Able to Move Arms Via Artificial Brain-muscle Connections

American researchers have successfully restored movement to monkeys with their arms temporarily anesthetized, with the aid of a direct artificial connection from their brains to muscles.

Using a direct artificial connection from the brain to the muscles, American researchers have successfully restored movement in monkeys which had their arms temporarily anesthetized.

Funded by the National Institutes of Health (NIH), the study may have promising implications for those affected by spinal cord injuries and thousands of others with paralyzing neurological diseases.

Stroke – Early Warning Signs - Risk Factor - Rehab - Treatment
Stroke can cause permanent disability and it is important to recognize its early warning signs to stop its progress. Early warning signs of stroke include sudden weakness of facial muscles.

"This study demonstrates a novel approach to restoring movement through neuroprosthetic devices, one that would link a person's brain to the activation of individual muscles in a paralyzed limb to produce natural control and movements," Nature magazine quoted Dr. Joseph Pancrazio, a program director at the National Institute of Neurological Disorders and Stroke (NINDS), as saying.

For their study, the researchers trained monkeys to control the activity of single nerve cells in the motor cortex, an area of the brain that controls voluntary movements.

The team used a type of brain-computer interface to detect neuronal activity. They connected electrodes implanted in the motor cortex were connected via external circuitry to a computer.

High Blood Pressure
High blood pressure or hypertension is defined as a blood pressure of above 140 mm Hg (systolic) and or 90mm Hg (diastolic).

The neural activity led to movements of a cursor, as monkeys played a target practice game.

Once the monkeys had mastered control of the cursor, their wrist muscles were temporarily paralyzed using a local anesthetic to block nerve conduction.

Cholesterol - Lipoproteins - Functions - Normal Blood Cholesterol Levels - Causes - Treatment - FAQs
Cholesterol is produced by the body (liver) and is essential for normal body functioning.

The team then converted the activity in the monkey's brain to electrical stimulation delivered to the paralyzed wrist muscles.

The monkeys continued to play the target practice game, demonstrating that they had regained the ability to control the otherwise paralyzed wrist.

Paralysed Limbs can be Reactivated by Single Brain Cell
One tiny brain cell is all it takes to restore voluntary movement of paralysed muscles, scientists in the United States reported Wednesday.

"A robotic arm would be better for someone whose physical arm has been lost or if the muscles have atrophied, but if you have an arm whose muscles can be stimulated, a person can learn to reactivate them with this technology," says lead researcher Dr. Eberhard E. Fetz, professor of physiology and biophysics at the University of Washington in Seattle.

The researchers believe that a connection between the motor cortex and sites in the spinal cord below the injury may enable those with spinal injuries to achieve coordinated movements.

Dr. Fetz, however, insists that clinical applications are still at least a decade away because they would require better methods for recording cortical neurons, for controlling multiple muscles, and implantable circuitry that could be used reliably and safely.

Source-ANI
RAS/SK