NSCI320 Lab Practical Study Notes

NSCI320 Lab Practical Study Notes

Overview

  • The NSCI320 Lab Practical encompasses various anatomical structures and pathways in the brain, specified with their locations and types of sections: coronal, horizontal, and sagittal.

Brain Slices

  • Coronal Slice: A vertical plane that divides the brain into anterior and posterior sections.
  • Horizontal Slice: A horizontal plane that separates the brain into superior and inferior parts.
  • Sagittal Slice: A vertical plane that separates the brain into left and right sections.

Key Anatomical Structures

  • Amygdala:

    • 3D Representation: Visual model demonstrating its placement in the brain.
    • Coronal Plane: Location and significance in emotion processing.
    • Horizontal Plane: Different views emphasize its role in fear and pleasure responses.
    • Sagittal Plane: Shows its anatomical relation to other structures.

  • Basilar Artery: Supplies blood to the brainstem and posterior cerebral circulation.

  • Vertebral Artery: Major arteries supplying the brain and spinal cord.

  • Brain Stem: Critical for basic life functions; connects brain to spinal cord.

  • Caudate Nucleus: A part of the basal ganglia involved in motor control.

    • 3D Caudate Nucleus: Visual representation to assist in understanding.
    • Coronal and Horizontal Views: Different perspectives important for anatomical identification.

Internal Capsule

  • Internal Capsule:
    • Separates the thalamus from the putamen and globus pallidus.
    • Crucial for communication between the cerebral cortex and lower areas.
  • External Capsule:
    • Separates the putamen from the claustrum.
  • Extreme Capsule:
    • Separates the claustrum from the insula.
  • Cerebellum Overview:
    • Arbor Vitae: Tree-like arrangement of white and gray matter within the cerebellum, important for motor control.
    • Folia: Folds of the cerebellar cortex, increasing surface area for neuronal connections.
    • Vermis: Central structure between cerebellar hemispheres.

Cerebrum Structures

  • Claustrum: Located in between the insula and putamen, involved in consciousness and sensory perception.
  • Colliculi (Tectum): Integral for visual and auditory processing.
    • Inferior Colliculus: Involved in auditory processing.
    • Superior Colliculus: Involved in visual processing.

Commissures

  • Corpus Callosum: Largest commissural fiber in the brain connecting left and right cerebral hemispheres.
    • Anterior Commissure: Connects the two temporal lobes.
    • Posterior Commissure: Located near the superior colliculi.

Language Areas

  • Broca's Area: Located in the inferior posterior frontal lobe; associated with speech production.
  • Wernicke's Area: Located in the superior temporal lobe; associated with language comprehension.

Other Brain Regions

  • Fusiform Face Area (FFA): Important for face recognition.
  • Parahippocampal Place Area (PPA): Associated with scene processing and spatial navigation.
  • Prefrontal Cortex: Involved in complex behaviors, decision-making, and moderating social behavior.

Nervous System Components

  • Olfactory Nerve/Bulb/Tract: Responsible for the sense of smell.
  • Optic Nerve: Involved in vision; extends from the eyes to the brain.
  • Optic Chiasm: X-shaped structure where optic nerves cross.
  • Vestibulocochlear Nerve: Involved in hearing and balance.
  • Vagus Nerve: Controls multiple involuntary processes, such as heart rate and digestion.

Brain Support Structures

  • Meninges:
    • Dura Mater: Tough outer layer of the meninges.
    • Arachnoid Membrane: Middle layer; contains cerebrospinal fluid.
    • Pia Mater: Delicate inner layer directly covering the brain.
  • Choroid Plexus: Structure that produces cerebrospinal fluid (CSF).
  • Ventricles: Fluid-filled spaces within the brain.
    • Lateral Ventricles: Two large cavities in the cerebral hemispheres, divided into anterior, posterior, and inferior horns.
    • Third Ventricle: Located at the midline of the brain, between the two halves of the thalamus.
    • Fourth Ventricle: Located between the brainstem and cerebellum.

Connections Between Structures

  • Cerebral Aqueduct: Connects the third ventricle to the fourth ventricle, facilitating CSF flow.
  • Interventricular Foramen: Connects lateral ventricles to the third ventricle.

Anatomical Orientation Terms

  • Central Sulcus: Separates the frontal lobe from the parietal lobe; involved in motor (precentral gyrus) and sensory (postcentral gyrus) functions.
  • Lateral Sulcus: Divides the frontal and parietal lobes above the temporal lobe.
  • Longitudinal Fissure: The deep groove that separates the two cerebral hemispheres.