The Human Brain during the First Trimester 15- to 18-mm Crown-Rump Lengths

CONTENTS

PART I. INTRODUCTION --------------------------------------------------------------------------------------------1

Organization of the Atlas ------------------------------------------------------------------------------------1

Specimens and Collections ----------------------------------------------------------------------------------1

Plate Preparation ----------------------------------------------------------------------------------------------2

3-Dimensional Computer Reconstructions----------------------------------------------------------------2

Neurogenesis in Specimens (CR 15 to 18 mm) ----------------------------------------------------------2

References ----------------------------------------------------------------------------------------------------20

PART II. 15 mm Crown Rump Length, C9247 --------------------------------------------------------------------22

Plates 1-7 A/B ----------------------------------------------------------------------------------------------24-37

High Magnification Plates 8-21 A/B---------------------------------------------------------------------38-65

PART III. 15 mm Crown Rump Length, M2051 -------------------------------------------------------------------66

Plates 22-38 A/B -----------------------------------------------------------------------------------------67-101

High Magnification Plate 39 A/B --------------------------------------------------------------------102-103

PART IV. 15.8 mm Crown Rump Length, C492 ------------------------------------------------------------------104

Plates 40-56 A/B ----------------------------------------------------------------------------------------106-139

PART V. 18 mm Crown Rump Length, C1390 -------------------------------------------------------------------140

Plates 57-63 A/B ---------------------------------------------------------------------------------------142-155

High Magnification Plate 64 A/B -------------------------------------------------------------------156-157

PART VI. 17.5 mm Crown Rump Length, M2155 ----------------------------------------------------------------158

Plates 65-81 A/B ---------------------------------------------------------------------------------------160-193

High Magnification Plates 82-84 A/B --------------------------------------------------------------194-199