Mind the Gap

There's nothing in my head
A vacuum's all that's here
I try to think of different thoughts but none of them appear

My cranium's a shell
A cavern bleak and black
I cannot write a poem if my brain does not come back

Just peer through either ear
You'll gaze at empty space
The organ once between them has now gone without a trace

I'm searching for some words
They're far too hard to find
So help me please Lost Property...I'm sure I've lost my mind