As we saw in chapter 10, the positions adjacent to C=C, the allylic position, often show enhanced reactivity compared to simple alkanes due to the proximity of the adjacent p system. Similarly, the positions adjacent to a benzene ring, known as the benzylic position also show enhanced reactivity compared to simple alkanes. Students often confuse the term benzyl with phenyl, for example compare the location of the bromine atoms in Bromobenzene and benzyl bromide: Highlight benzylic carbon atom.
A probable cause of numbness in the upper, outer thigh is meralgia paresthetica, a condition that occurs when the nerve that provides sensation to the thighâs surface is compressed, according to Mayo Clinic. It often occurs on one side of the body and worsens upon walking or standing. Continue Reading.
Whereas leg numbness is a loss of sensation, paralysis involves a loss of movement, with or without the loss of sensation in the area. Depending on the cause, the loss of sensation can disappear quickly, such as numbness in the buttocks and legs after sitting with your legs crossed for a long time. Numbness can occur suddenly or progress slowly. Chronic leg numbness generally indicates some level of damage to the nerves.