Lecture Notes: The Human Brain - Nancy Camwisher

Introduction

• Professor: Nancy Camwisher
• Course Topic: The Human Brain
• Class begins at 11:05; aims to start promptly each time.
• Agenda:
  • Brief story (10 minutes)
  • Discuss importance of studying the human brain (why, how, what)
  • Course mechanics (grades, syllabus)

Story of Bob

• A true story about a friend, Bob, and his medical situation that highlights themes relevant to the course:
  • Nature of the human mind
  • Organization of the brain
  • Recovery after brain damage
  • Resilience, privilege, expertise

Incident Overview

• Bob stayed overnight before attending a conference.
• In the morning, he collapsed and was unresponsive.
• Emergency Medical Technicians (EMTs) arrived and took Bob to the ER, where tests were inconclusive.
• Professor had a concern about Bob's brain due to previous signs of navigational difficulties.

Medical Findings

• Radiology Results:
  • Brain scan revealed a tumor (size of a lime) near the para-hippocampal place area, related to navigation.
  • Historical scans indicated the tumor had been growing slowly (initially the size of a grape).
  • Diagnosed as a meningioma (not cancer, but still required surgery).

Surgery and Aftermath

• Bob underwent an 11-hour surgery to remove the tumor.
• After surgery, Bob's cognitive abilities returned to normal, but navigational skills were not recovered.
• Impact of Brain Damage:
  • Specific cognitive abilities can be lost while others remain intact.
  • Adult brains show less plasticity than children's.

Themes from the Story

1. Structure and Organization of the Brain: Different brain parts have specialized functions.
2. Specific Functions: Some brain areas are highly specialized for particular mental tasks.
3. Mental Processes: Understanding the brain helps us understand mental processes and their organization.
4. Recovery and Change: Brain damage can lead to permanent loss of specific functions.
5. Methods of Study: Different methods exist to investigate brain functions (e.g., neuropsychology, brain imaging).

Importance of Studying the Brain

• Know Thyself: Understand the brain as the essence of personal identity.
• Limits of Human Knowledge: Exploring cognitive limits and understanding the knower.
• Advancing AI: Insights from studying the brain inform artificial intelligence development.
• Intellectual Quest: Understanding the brain is considered the greatest intellectual challenge.

How We Will Study the Brain

• Focus on the relationship between brain functions and mental capabilities.
• Explore various mental functions (perception, cognition, etc.) and their neural bases.
• Levels of Analysis:
  • Molecules and interactions
  • Neurons and circuits
  • Brain regions and networks

Methods of Study

• Behavioral observations (reaction times, accuracy).
• Neuropsychological studies (case studies like Bob's).
• Imaging techniques (fMRI, EEG, etc.).
• Goal: Understand how mental functions are represented in the brain.

Course Mechanics and Structure

• Grading:
  • Midterm (25%), Final (25%), Reading/Writing assignments (two papers per week), quizzes.
• Emphasis on reading and understanding scientific papers.
• No textbook; focus on up-to-date articles and original research.

Important Dates

• First written assignment due: February 12th, 6 PM on Stellar.
• First quiz: February 20th.

Closing Remarks

• Future topics will include: high-level vision, navigation, language understanding, and brain networks.
• The next class will feature a brain dissection led by a guest neuroscientist.
• Emphasis on reading current research articles and engaging with recent findings.