They occur in two oxidation states, +2 and +4. Silicon and germanium share similar physical and chemical characteristics, since both are metalloids. Silicon. Silicon is the element with atomic number 14, and it is in the group 14 of the periodic table, just below carbon.
A paresthesia is an abnormal sensation of tingling, numbness, or burning. Paresthesias are usually felt in the hands, feet, arms, or legs, but can be felt anywhere. The sensation is usually unpleasant.
Spinal anaesthesia. Spinal anaesthesia (or spinal anesthesia), also called spinal block, subarachnoid block, intradural block and intrathecal block,[1] is a form of regional anaesthesia involving the injection of a local anaesthetic into the subarachnoid space, generally through a fine needle, usually 9 cm (3.5 in) long.