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Reflex action of the Spinal Cord The spinal animal: a reflex act is the activity in some effector (muscle-gland) by the stimulation of a receptor. The simplest reflex arc or circuit consists of a receptor, an afferent neurone, an efferent neurone, and effector, or organ of response. The minimum the critical number of neurons in th…

Tracts Of The Spinal Cord Ascending tracts The fasciculus gracilis is medial to fasciculus cuneatus. They are made up principally of the ascending branches of the dorsal root fibers The fibers in the gracilis come from the sacral, lumbar, and lower thoracic nerves. Those in the cuneatus, from the upper thoracic and cervical…

Functions of the spinal cord 1. it is the seat of any reflex centers controlling the muscles of the trunk and limbs; 2. It is a Lot conduction between these centers and the correlation centers of the brain The first function is more primitive and is therefore to be of great importance in low vertebrates such as the frog. – In h…

Mechanical Machine tools A machine tool is a power-driven apparatus designed to perform certain metal-removing operations and produce a desired form on the surface being machined. As most machined surfaces require to be either cylindrical or flat, the work of machine tools in general is concerned with producing one or both…