1. Sheep Brain Dissection Lab
- Purpose of today’s lab
Examine the gross anatomy of a sheep brain. Compare the anatomy of a sheep brain to a human brain and make physiological predictions based on your observations.

2. Sheep Brain Dissection Lab
Directions: View the powerpoint and fill in the blanks on your prelab!

3. Why Wrinkles on the Brain?
- the wrinkles and grooves of the cerebrum
Fissures = deep groove
Sulcus = shallow groove
Gyrus = bump

4. Dura mater is being peeled away in this photo.

6. THE BRAIN
ANATOMICAL REGIONS
Cerebrum
Cerebellum
Brain Stem

7. CEREBELLUM
Balance and coordination

8. CEREBRUM - wrinkly large part of the brain, largest area in humans, higher mental function

9. Brain Stem - regulates visceral functions (autonomic system)

11. Figure 13.4

12. 1. Cerebral Hemispheres - left and right side separated by the ....
2.  Corpus Callosum 
-  connects the two hemispheres 

13. The Cerebral Hemispheres
Figure 13.7b, c

14. Take the Left Brain – Right Brain Test

15. Corpus callosum

16. 4. Fissures – separate lobes
Longitudinal fissure - separate right and left sides

17. Transverse Fissure - separates cerebrum from cerebellum

18. Lateral Fissure separates the temporal lobe from the Frontal and Parietal lobes

20. Lobes of the Brain (general functions)
5.  Frontal – reasoning, thinking, language
6. Parietal – touch, pain, relation of body parts (somatosensory)
7.  Temporal Lobe – hearing
8.  Occipital – vision

21. LOBES OF THE BRAIN (CEREBRUM)
Figure 13.7a
Sulcus = groove
Gyrus = raised bump
Fissure = deep groove

22. 9.  Cerebral Cortex - thin layer of gray matter that is the outermost portion of cerebrum (the part with all the wrinkles)

23. Functional and Structural Areas of the Cerebral Cortex
Figure 13.11a

24. 10.VENTRICLES OF THE BRAIN
Fluid filled cavities, contain CSF

25. 11. Cerebrospinal Fluid (CSF) - fluid that protects and supports brain
Figure 13.27b

26. FUNCTIONAL REGIONS
A. MOTOR AREAS
B. SENSORY AREAS
C. ASSOCIATION

27. 12.  Motor Areas
- controls voluntary movements - the right side of the brain generally controls the left side of the body
-also has Broca's Area (speech)

28. 13. Sensory Area - involved in feelings and sensations
   (visual, auditory, smell, touch, taste)

29. 14.  Association Areas
- higher levels of thinking, interpreting and analyzing information

30. BRAIN STEM
Figure 13.4

31. BRAIN STEM
Consists of three parts:  
MIDBRAIN
PONS
MEDULLA OBLONGATA

32. 14. Diencephalon has 2 parts.....
A. Hypothalamus - hormones, heart rate, blood pressure, body temp, hunger B. Thalamus - relay station

33. 4. Optic Tract / Chiasma - optic nerves cross over each other

35. Cerebellum - balance, coordination
5.  Midbrain – visual reflexes, eye movements
6. Pons - relay sensory information
7.  Medulla – heart, respiration, blood pressure

36. Pituitary Gland
The "master gland" of the endocrine system.  It controls hormones.

37. Corpus callosum
Thalamus
Pineal gland
Hypothalamus

38. Medulla Oblongata
Midbrain
Pons

40. Check out these brain images!