The type of brain damage which has been associated with an inability to form declarative memories is the damage to the dorsomedial thalamus and the mammillary bodies.
Declarative memory is what one most often think of as a memory. So, for instance, this means that remembering where you were when you first rode your bicycle or where you were when the challenger exploded are some of the examples of declarative memory.
So here, the type of brain damage which is said to be associated with an inability in order to form declarative memories is considered to be the damage to the dorsomedial thalamus and also the mammillary bodies.
Hence, option A is correct.
The given question is incomplete, the complete question is-
Which of type of brain damage has been associated with an inability to form declarative memories? group of answer choices
A. The damage to the dorsomedial thalamus and the mammillary bodies.
B. Destruction of tissue in medial temporal lobe because of extensive alcohol consumption.
C. Damage to the basal forebrain regions, including the hippocampi, from rupture of the anterior cerebral arteries.
D. Bilateral surgical damage to the hippocampi.
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