Final Exam Flashcards
(328 cards)
Pre embryonic stage
First two weeks
Embryo
3 to 8 weeks
Fetus
9 weeks to the end of pregnancy
Gastrulation
Third week. Two layers differentiate into ectoderm, endoderm, mesoderm.
Ectoderm
Epidermis, eyes, nervous system
Mesoderm
Notochord, muscular, skeletal system, circulatory system
Endoderm
Lining of organs, liver and pancreas
Dermatomyotomes
Mesoderm differentiate into 44 pairs of somites
Somites
Ventral side: ribs and vertebrae
Dorsal side: dermis and segmental innervation
Myotomes
He used to make skeletal muscle and segmented innervation
Upper limb growth fourth week location
Form from C5 to T1.
Lower limb growth at 7 weeks
Form from L2 to s2. Flexures develop, big toe points upward
Limb development at seven weeks
Limbs rotate 90°, but in opposite directions
Digit abnormalities
Syndactyly: fused
Adactyly: missing
Ectrodactyly: missing middle digits
Limb abnormalities
Amelia: missing, limb
Meromelia: partial absence
Phocomelia: shortened lower extremities
Radial longitudinal deficiency: missing, or malformed radius
Spina bifida
Two sides of vertebrae failed to fuse, due to folic acid deficiency.
Oculta: bump, asymptomatic
Meningocele: contain cerebral spinal fluid
Myelomeningocele: spinal cord
Bony landmarks of the vertebrae
Body,pedicle, transverse process, pars Interarticularis, lamina, spinous process, inferior, facet, superior, facet, vertebral foramen
Lateral and medial adduction and abduction
Movement of middle finger
Vertebral sections
Cervical: secondary, seven
Thoracic: primary, 12
Lumbar: secondary, five
Sacral: primary, five
Coccyx: four
Atlas: C1
Forms atlanto occipital joint (OA). Yes, action lax spinous process.
Axis: C2
Forms atlantoaxial joint (AA). No action possesses. “dens”
Cervical vertebrae
Seven, bifid spinous process, flat facet joints.
Thoracic vertebrae
- Long spinous process, stop sign, facet joints
Lumbar vertebrae
Five. Short stubby, spinous process