Brain PPT

Announcements

•If you don’t want to participate in the brain dissection next
week, please tell me through Remind or by email so other
arrangements can be made

•The dissection will be a lab grade!

The Brain!!!

General Anatomy

•Cerebrum – sensation, higher order
thinking, motor control
•Cerebellum – coordinating
movement
•Diencephalon – relay center for
sensory information
•Midbrain – coordinates motor
activity, especially for eyes
•Brainstem – controls involuntary
functions, like breathing

Multiple Choice

Which of the following structures assists with sensation, higher order thinking, and motor control?

• Cerebrum

• Diencephalon

• Midbrain

• Brainstem

Multiple Choice

What structure coordinates motor activity, especially for eyes

• Cerebrum

• Diencephalon

• Midbrain

• Brainstem

Cerebrum

Divided Into Left & Right Hemispheres

•Each hemisphere receives info from/controls muscles of
opposite side of body
•Some specialization of function, but people aren’t left or
right brained

Corpus Callosum

•Bundle of axons that
connect left & right cerebral
hemispheres

Multiple Choice

What is the bundle of axons that connect left & right cerebral hemispheres called?

• Midbrain

• Cerebellum

• Corpus Callosum

• Cerebrum

Cerebral Cortex

•Thin, top layer of
cerebrum
•Contains cell bodies
•Functional area of
cerebrum
•Different areas perform
different functions

Cerebral Lobes Have Specific Functions

•Frontal – Decision making,
planning & executing
motor movements
•Parietal – Touch sensation,
integration of sensory info
•Temporal – Auditory
sensation, memory
formation, language
interpretation
•Occipital – Visual sensation

Primary Motor & Somatosensory Cortices

•Primary motor cortex sends signals to motor neurons to
move voluntary muscles
•Somatosensory cortex receives sensory information from the
skin
•Size of area dedicated to region indicates sensitivity

Dropdown

The ​

Select answer

cortex receives sensory information from the skin

Homunculi

•Representation of how much cortex devoted to
control/sensitivity of particular region of body
•Hands & face tend to be more heavily represented

Speech Centers

•Broca’s Area: near motor
cortex

•Involved in speech
production

•Wernicke’s Area: near
auditory cortex

•Involved in speech
interpretation

Drag and Drop

​

Placeholder

is Involved in speech production​

Drag these tiles and drop them in the correct blank above

Broca's area

Wernicke's area

​Now some review questions!

Reorder

Reorder the following steps for a muscle contraction

• Action potential is generated

• Calcium ions are released from sarcoplasmic reticulum

• Ca2+ binds troponin causing tropomyosin to expose binding sites on actin

• Myosin heads bind to actin forming crossbridges

• Actin filaments are pulled toward center of the sarcomere and sarcomere shortens and the muscle contracts

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Dropdown

​

Select answer

contractions occur when the muscles do not shorten; no movement occurs

Drag and Drop

All of the parts that belong to a neuron are the: ​

Placeholder

​

Placeholder

​

Placeholder

​

Placeholder

Drag these tiles and drop them in the correct blank above

Axon

Dendrite

Node of ranvier

Myelin

Tendon

Myocyte

Dermocyte

Follicle

Multiple Choice

How many ways of producing energy are there for your body?

• 2

• 3

• 4

• 5

Homework

•Finish any missing work