text about OCD（强迫症），这里有几个词不明白

Question

Tics and Tourette’s syndrome: Involuntary
sounds and movements

Everyone demonstrates a few behaviors from time to time that can look a lot
like tics. For example, who hasn’t drummed fingers, tapped a pencil, or expe-
rienced a sudden body jerk? However, those behaviors don’t quite qualify as
tics. That’s because tic disorder involves movements or sounds that occur
against a person’s will, suddenly, repeatedly, and irresistibly. Tourette’s
syndrome includes multiple movements with sounds.

drum fingers是什么意思？tapped a pencil是不是削铅笔（猜的），那tap在这里取何意，金山词霸里查到的意思好像都不太符合。

金山词霸：
tap vt. 开发；（从容器等）汲取（液体）；割[打]开…取[放]液体 vi. 轻声走；跳踢踏舞 n. 龙头，阀门；塞子；电话窃听；（补鞋的）掌子

Answer 1

您好，很高兴能帮助您！

此为正解：

drum fingers - drum 是鼓的意思，作为动词就是打鼓过敲打，顾名思义drum fingers 就是用手指头打鼓（手指敲打桌子就像打鼓一样）或敲打的意思

tap a pencil - tap 也是敲打的意思，作为动词就是重复敲打的意思，顾名思义tap a pencil 就是用铅笔不断重复敲打的意思

来自分类排名第一的英语牛人团，是信心的保证，满意请采纳！

Answer 2

一个是用手指打节拍，一个是用铅笔打节拍。tap是轻拍、轻扣的意思。这是我的理解。

又查了一下词典，tap确实有“敲节拍，打拍子”的意思