TELENCEPHALONTELENCEPHALON

Lecture 6Lecture 6

CerebrumCerebrum

80 percent of brain mass80 percent of brain massGyri and sulciGyri and sulciLeft and right hemispheres:Left and right hemispheres:

Falx cerebriFalx cerebri

Superior to cerebellumSuperior to cerebellumTentorium cerebelliTentorium cerebelli

Five (six?) lobesFive (six?) lobes

CerebrumCerebrum

Olfactory bulbOlfactory bulbBasal nuclei (ganglia):Basal nuclei (ganglia):

Corpus striatum (nuclei in cerebrum):Corpus striatum (nuclei in cerebrum):

Caudate nucleusCaudate nucleusLentiform nucleusLentiform nucleus

Caudate NucleusCaudate Nucleus

Large subconscious movements of skeletal Large subconscious movements of skeletal muscles.muscles.

Lentiform NucleusLentiform Nucleus

Putamen:Putamen:Large subconscious movements of skeletal Large subconscious movements of skeletal muscles.muscles.

Globus pallidus:Globus pallidus:Regulates muscle tone.Regulates muscle tone.

Cerebral LobesCerebral Lobes

OccipitalOccipitalParietalParietalFrontalFrontalTemporalTemporalInsulaInsula

Occipital LobeOccipital Lobe

Integrates eye focusing movements.Integrates eye focusing movements.Correlates visual images with visual Correlates visual images with visual

memory.memory.Involved in conscious perception of vision.Involved in conscious perception of vision.Separated from parietal lobe:Separated from parietal lobe:

Parietooccipital sulcusParietooccipital sulcus

Parietal LobeParietal Lobe

Somatesthetic interpretation:Somatesthetic interpretation:Postcental gyrus.Postcental gyrus.

Understanding speech.Understanding speech.Auditory association cortex.Auditory association cortex.Wenicke’s area.Wenicke’s area.

Formulating words to express thoughts and Formulating words to express thoughts and emotions.emotions.

Frontal LobeFrontal Lobe

Voluntary motor control:Voluntary motor control:Precentral gyrus.Precentral gyrus.

MotivationMotivationAggressionAggressionMoodMood

Frontal LobeFrontal Lobe

PersonalityPersonalityCognitive processesCognitive processesVerbal communication:Verbal communication:

Broca’s area.Broca’s area.

Temporal LobeTemporal Lobe

Receives/interprets olfactory and auditory Receives/interprets olfactory and auditory sensations.sensations.

Responsible for storage of memory related Responsible for storage of memory related to auditory and visual experiences.to auditory and visual experiences.

InsulaInsula

Not observed from surface.Not observed from surface.Involved with memory.Involved with memory.Psychic cortex:Psychic cortex:

Highest levels of brain function:Highest levels of brain function:Abstract thoughtAbstract thoughtJudgment Judgment