He then got a frying pan and hit her three to four times on head while she was lying on the floor.
Worried about the blood, Parekh got a pillow and held it to her head before phoning emergency services.
The victim was hospitalised with cuts and bruises to her head and shoulders.
Parekh later told police that his mother had kept going at him when he lost control and wanted to kill her.
He was originally charged with attempted murder but pleaded guilty to a reduced charge of wounding with intent to cause grievous bodily harm.
At the start of his sentencing today, he told Justice Rachel Dunningham: "I'm extremely sorry for my actions. And I wish I could've made a better decision at the time. But unfortunately for the state of mind I was in at the time, I wasn't able to do so."
His "remorse, regret and shame is very real", defence counsel Ruth Buddicom said.
He couldn't bare to look at photos of the harm he caused his mother, who is now living in the UK, the court heard.
Crown prosecutor Courtney Martyn accepted that Parekh had "snapped".
A pre-sentence report noted that Parekh had experienced a dysfunctional childhood and had a difficult relationship with who he felt was a "controlling mother".
Justice Dunningham sentenced him to five years, three months imprisonment and gave him a first strike warning.