Extrapyramidal side effects are common in
**Core Concept**
Extrapyramidal side effects (EPS) are a group of movement disorders associated with antipsychotic medications that affect the dopaminergic pathways in the brain. They occur due to the blockade of dopamine D2 receptors in the nigrostriatal pathway, leading to an imbalance between dopamine and acetylcholine neurotransmission.
**Why the Correct Answer is Right**
The correct answer is associated with the use of typical antipsychotics, which are known to cause EPS due to their strong blockade of dopamine D2 receptors. This blockade disrupts the normal dopamine-acetylcholine balance in the striatum, leading to symptoms such as akathisia, dystonia, and parkinsonism. The nigrostriatal pathway, which involves the substantia nigra and the striatum, is particularly affected, resulting in the characteristic EPS symptoms.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because atypical antipsychotics, which are also known as second-generation antipsychotics, have a lower risk of EPS due to their weaker blockade of dopamine D2 receptors. They tend to have a more balanced effect on dopamine and serotonin receptors.
**Option B:** This option is incorrect because benzodiazepines are not typically associated with EPS. They primarily act on the GABA_A receptor and are used to treat anxiety and insomnia.
**Option C:** This option is incorrect because selective serotonin reuptake inhibitors (SSRIs) are not typically associated with EPS. They primarily act on the serotonin transporter and are used to treat depression and anxiety disorders.
**Option D:** This option is incorrect because lithium is not typically associated with EPS. It is primarily used to treat bipolar disorder and has a different mechanism of action, involving the inhibition of inositol monophosphatase.
**Clinical Pearl / High-Yield Fact**
EPS are more common in elderly patients and those with a history of Parkinson's disease, as they may have a lower threshold for developing these symptoms.
**Correct Answer: C. Typical antipsychotics are associated with extrapyramidal side effects due to their strong blockade of dopamine D2 receptors.**