{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter 12 CNS part 1

Chapter 12 CNS part 1 - Chapter 12 Central Nervous System...

Info icon This preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 12 Central Nervous System Part 1 Angela Peterson-Ford, PhD [email protected]
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Central Nervous System (CNS) CNS – composed of the brain and spinal cord Cephalization Elaboration of the anterior portion of the CNS Increase in number of neurons in the head Highest level is reached in the human brain
Image of page 2
The Brain Composed of wrinkled, pinkish gray tissue Surface anatomy includes cerebral hemispheres, cerebellum, and brain stem
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Embryonic Development During the first 26 days of development: Ectoderm thickens along dorsal midline to form the neural plate The neural plate invaginates, forming a groove flanked by neural folds The neural groove fuses dorsally and forms the neural tube
Image of page 4
Surface ectoderm (a) 19 days (b) 20 days (c) 22 days (d) 26 days Neural folds Neural crest Surface ectoderm Neural groove Neural tube Anterior (rostral) end Embryonic Development Figure 12.1 Level of section Neural plate
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Primary Brain Vesicles The anterior end of the neural tube expands and constricts to form the three primary brain vesicles Prosencephalon – the forebrain Mesencephalon – the midbrain Rhombencephalon – hindbrain
Image of page 6
Neural Tube and Primary Brain Vesicles Figure 12.2a, b
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Secondary Brain Vesicles In week 5 of embryonic development, secondary brain vesicles form Telencephalon and diencephalon arise from the forebrain Mesencephalon remains undivided Metencephalon and myelencephalon arise from the hindbrain
Image of page 8
Secondary Brain Vesicles Figure 12.2c
Image of page 9

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Adult Brain Structures Fates of the secondary brain vesicles: Telencephalon – cerebrum: cortex, white matter, and basal nuclei Diencephalon – thalamus, hypothalamus, and epithalamus Mesencephalon – brain stem: midbrain Metencephalon – brain stem: pons Myelencephalon – brain stem: medulla oblongata
Image of page 10
Adult Neural Canal Regions Figure 12.2c, d
Image of page 11

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern