Extrafusal muscle fiber Extrafusal muscle fiber Extrafusal muscle fibers are the skeletal standard muscle fibers that are innervated by alpha motor neurons and generate tension by contracting, thereby allowing for skeletal movement. They make up the large mass of skeletal muscle tissue and are attached to bone by fibrous tissue extensions (tendons). Each alpha motor neuron and the extrafusal muscle fibers innervated by it make up a motor unit. The connection between the alpha motor neuron and the extrafusal muscle fiber is a neuromuscular junction, where the neuron's signal, the action potential, is transduced to the muscle fiber by the neurotransmitter acetylcholine. Extrafusal
Bertram A. Bone Bertram A. Bone Bertram Allison Bone (September 19, 1893 - October 22, 1961) was a decorated officer of the United States Marine Corps with the rank of Brigadier General. He is most noted for his service as commanding officer, 1st Defense Battalion during the early phase of the World War II. He later served with V Amphibious Corps during Battle of Leyte and led 10th Marine Regiment during the Battle of Okinawa. Bertram A. Bone was born on September 19, 1893 in San Diego, California and studied high school there. Upon the graduation, he attended University of California, Berkeley and