The fingers have two long flexors, located on the underside of the forearm. They insert by tendons to the phalanges of the fingers. The deep flexor attaches to the distal phalanx, and the superficial flexor attaches to the middle phalanx.
An adult can only get a maximum IQ of 161 on the Cattell III B test and 183 on Culture Fair. A top two per cent score on Cattell III B would be 148 or over, while for Culture Fair it is 132 or over. The two papers test different types of IQ.
There is also no highest IQ possible. Most tests have a maximum possible score you can get on them (For example, the most common professional test in the USA, WAIS, has a maximum possible score of 160 SD 15). However, in theory IQ has no limitation.