Could he have had a blow to the head causing this atrophy?
1	Could	could	AUX	MD	VerbForm=Fin	4	aux	4:aux	_
2	he	he	PRON	PRP	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	4	nsubj	4:nsubj	_
3	have	have	AUX	VBP	VerbForm=Inf	4	aux	4:aux	_
4	had	have	VERB	VBN	Tense=Past|VerbForm=Part	0	root	0:root	_
5	a	a	DET	DT	Definite=Ind|PronType=Art	6	det	6:det	_
6	blow	blow	NOUN	NN	Number=Sing	4	obj	4:obj	_
7	to	to	ADP	IN	_	9	case	9:case	_
8	the	the	DET	DT	Definite=Def|PronType=Art	9	det	9:det	_
9	head	head	NOUN	NN	Number=Sing	6	nmod	6:nmod:to	_
10	causing	cause	VERB	VBG	VerbForm=Ger	4	advcl	4:advcl	_
11	this	this	DET	DT	Number=Sing|PronType=Dem	12	det	12:det	_
12	atrophy	atrophy	NOUN	NN	Number=Sing	10	obj	10:obj	SpaceAfter=No
13	?	?	PUNCT	.	_	4	punct	4:punct	_
