Deeper Brain Structures Practice Flashcards

This set of vocabulary flashcards covers the deeper structures of the brain described in the lecture notes, including the limbic system, ventricles, various glands, and neural loops.

Limbic System

A complex network of structures including the hippocampus, amygdala, hypothalamus, and cingulate gyrus involved in emotions, memory, motivation, and learning.

Ventricles

Interconnected fluid-filled cavities within the brain, including two lateral ventricles, a third ventricle, and a fourth ventricle.

Cerebrospinal fluid (CSF)

Fluid derived from plasma that cushions the brain and removes waste; it is replaced approximately every $6-8$ hours.

Choroid plexus

The lining within the ventricles responsible for the production of cerebrospinal fluid (CSF).

Amygdala

A small, almond-shaped structure in the temporal lobe central to processing emotions, particularly fear and aggression.

Hypothalamus

A small area at the base of the brain crucial for maintaining homeostasis by regulating temperature, hunger, thirst, and circadian rhythms.

Pineal Gland

A small endocrine gland located in the brain's center that produces melatonin to regulate sleep-wake cycles.

Melatonin

A hormone produced by the pineal gland that is sensitive to light levels and helps maintain the body's internal clock.

Hippocampus

A seahorse-shaped structure in the temporal lobe vital for forming and consolidating new memories, especially declarative memories.

Blood-brain barrier

A protective barrier formed by specialized cells in blood vessel walls that restricts passage of substances from the bloodstream into the brain.

Circle of Willis

A circular arrangement of blood vessels at the base of the brain that acts as a collateral circulation pathway to maintain steady blood supply.

Thalamus

A central relay station that receives sensory information and transmits it to the appropriate regions of the cerebral cortex.

Midbrain (Mesencephalon)

A part of the brainstem containing nuclei for visual and auditory reflexes, wakefulness, arousal, and the substantia nigra.

Substantia nigra

A structure that produces dopamine and is involved in movement control; it is housed in the midbrain and is a component of the basal ganglia.

Basal Ganglia

A group of interconnected nuclei (including the striatum and globus pallidus) involved in motor control, procedural learning, and cognitive functions.

Motor Loop

A basal ganglia loop connecting with the primary motor cortex to plan and control voluntary movements; dysfunctions can lead to Parkinson's disease.

Prefrontal Loop

A basal ganglia loop linked with the prefrontal cortex responsible for executive functions like decision-making and working memory.

Limbic Loop

A basal ganglia loop connecting with the amygdala and hippocampus that influences emotional processing, motivation, and reward-based learning.