Brain imaging techniques, like MRI, CT, and PET scans, help us look inside the brain. But they have some important drawbacks that make it harder for us to understand how the brain works.

1. Spatial Resolution:

   • MRI and CT scans can’t always see tiny parts of the brain, like synapses and dendrites. This makes it difficult to know exactly how brain connections work.
   • PET scans are even less clear, so it’s tough to pinpoint where activity is happening in the brain.

2. Temporal Resolution:

   • These scans usually show still pictures of the brain. They don’t show what’s happening in real-time. This is important because brain activities like learning and memory change all the time.

3. Interpretative Challenges:

   • Sometimes it’s hard to understand what the results mean. The brain is very complicated, and just because we see more blood flow in a PET scan doesn’t mean the brain cells are more active.

4. Cost and Accessibility:

   • These advanced imaging technologies can be very expensive. This high cost makes it hard for many places to use them for research.

To help solve these problems, scientists are working on mixing different techniques together, like combining fMRI and EEG. They are also improving computer models. These new methods can help us understand the brain's structures and how they function better.