The symptoms of a stroke are different, depending on where in the brain the stroke is located, and doctors can use the symptoms to pinpoint the site of the stroke. In the case of a brain stem stroke, the patient often experiences vertigo, slurred speech, and difficulty speaking.
The smallest functional unit in a myofibril is a sarcomere. A sarcomere is composed of thin (actin) and thick (myosin) filaments. Actin slides past myosin when the muscle contracts.
Myofibrils are cleverly organised strands of the proteins actin and myosin, which work together to cause shortening of the muscle. Peripheral nuclei is a characteristic feature of skeletal muscle cells, and shows how these cells originally came from lots of young muscle cells fused together.