In a neuroanatomy context, the word
pallium means the evolutionary precedent of the
cerebrumThe cerebrum or telencephalon, together with the diencephalon, constitute the forebrain, along with the front lobe. It is the most anterior or, especially in humans, most superior region of the vertebrate central nervous system. "Telencephalon" refers to the embryonic structure, from which the...
.
The human pallium (
cloak in
LatinLatin is an Italic language originally spoken in Latium and Ancient Rome. Through the Roman conquest, Latin spread throughout the Mediterranean and a large part of Europe...
) envelops the forebrain. The cerebrum has been described as having three parts: the
archipalliumIn anatomy of animals, the archipallium is the oldest region of the brain's pallium.The archipallium is often considered contiguous with the olfactory cortex, but the extent of the archipallium varies among species. In older species, such as fish, the archipallium makes up most of the cerebrum...
, the
paleopalliumIn anatomy of animals, the paleopallium is a region within the telencephalon in the brain.It is a primitive and evolutionarily ancient region of the brain, first appearing in amphibians....
and the neopallium. The developing telencephalon or forebrain is divided into pallium and subpallium.
In amphibians, the cerebrum includes archipallium, paleopallium and some of the
basal nucleiThe basal ganglia are a group of nuclei in the brains of vertebrates, situated at the base of the forebrain and strongly connected with the cerebral cortex, thalamus and other areas. The basal ganglia are associated with a variety of functions, including motor control and learning...
.
Reptiles first developed a neopallium, which continued to develop in the brains of more recent species to become the
neocortexThe neocortex , also called the neopallium and isocortex , is a part of the brain of mammals. It is the outer layer of the cerebral hemispheres, and made up of six layers, labelled I to VI...
of
mammalMammals are a class of vertebrate animals whose females are characterized by the possession of mammary glands while both males and females are characterized by sweat glands, hair, three middle ear bones used in hearing, and a neocortex region in the brain.Mammals are divided into three main...
s.
In
fishA fish is any aquatic vertebrate animal that is typically ectothermic , covered with scales, and equipped with two sets of paired fins and several unpaired fins...
, the archipallium is the largest part of the cerebrum.
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In a neuroanatomy context, the word
pallium means the evolutionary precedent of the
cerebrumThe cerebrum or telencephalon, together with the diencephalon, constitute the forebrain, along with the front lobe. It is the most anterior or, especially in humans, most superior region of the vertebrate central nervous system. "Telencephalon" refers to the embryonic structure, from which the...
.
In humans
The human pallium (
cloak in
LatinLatin is an Italic language originally spoken in Latium and Ancient Rome. Through the Roman conquest, Latin spread throughout the Mediterranean and a large part of Europe...
) envelops the forebrain. The cerebrum has been described as having three parts: the
archipalliumIn anatomy of animals, the archipallium is the oldest region of the brain's pallium.The archipallium is often considered contiguous with the olfactory cortex, but the extent of the archipallium varies among species. In older species, such as fish, the archipallium makes up most of the cerebrum...
, the
paleopalliumIn anatomy of animals, the paleopallium is a region within the telencephalon in the brain.It is a primitive and evolutionarily ancient region of the brain, first appearing in amphibians....
and the neopallium. The developing telencephalon or forebrain is divided into pallium and subpallium.
In amphibians and reptiles
In amphibians, the cerebrum includes archipallium, paleopallium and some of the
basal nucleiThe basal ganglia are a group of nuclei in the brains of vertebrates, situated at the base of the forebrain and strongly connected with the cerebral cortex, thalamus and other areas. The basal ganglia are associated with a variety of functions, including motor control and learning...
.
Reptiles first developed a neopallium, which continued to develop in the brains of more recent species to become the
neocortexThe neocortex , also called the neopallium and isocortex , is a part of the brain of mammals. It is the outer layer of the cerebral hemispheres, and made up of six layers, labelled I to VI...
of
mammalMammals are a class of vertebrate animals whose females are characterized by the possession of mammary glands while both males and females are characterized by sweat glands, hair, three middle ear bones used in hearing, and a neocortex region in the brain.Mammals are divided into three main...
s.
In fish
In
fishA fish is any aquatic vertebrate animal that is typically ectothermic , covered with scales, and equipped with two sets of paired fins and several unpaired fins...
, the archipallium is the largest part of the cerebrum. Some researchers suggest the early archipallium gave rise to the human
hippocampusThe hippocampus is a major component of the brains of humans and other mammals. It belongs to the limbic system and plays important roles in long-term memory and spatial navigation. Like the cerebral cortex, with which it is closely associated, it is a paired structure, with mirror-image halves in...
.