اناٹومی مطالعاتی نوٹ · Back

Atlas (C1)

The first cervical vertebra. It has no body and no spinous process, only anterior and posterior arches joined by two lateral masses, and it carries the skull.

اہم نکات

• No body, no spine: anterior + posterior arches and two lateral masses.
• Atlanto-occipital joints = nodding (“yes”).
• Atlantoaxial joints (3) = rotation (“no”).
• Transverse ligament holds the dens against the anterior arch.
• Jefferson fracture: burst ring from vertical compression.
• Occipitalization of the atlas.
• Vertebra = caudal half of one sclerotome + cranial half of the next.
• Bone: type I collagen + hydroxyapatite.
• Osteoblast builds, osteocyte maintains, osteoclast resorbs.

اٹلس میں مکمل نوٹ میں یہ بھی شامل ہے

خصوصیات · Articulations · Action · Histology · Development · طبی اہمیت

مفت سائن اِن کریں تاکہ اسے 3D ماڈل پر دیکھیں، مکمل نوٹ پڑھیں اور اس پر سوالات کی مشق کریں۔

ماخذ

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 2, PDF pp. 128–129, 143–145, 154
• Inderbir Singh’s Human Embryology, ch. 10, PDF pp. 134–137, 137
• BRS Cell Biology & Histology, 7th ed., ch. 7, PDF pp. 121–125, 130

back سے مزید

• Axis (C2)
• Cervical vertebrae
• Deep muscles of the back
• Intervertebral discs
• Ligaments of the vertebral column
• Lumbar vertebrae
• Spinal cord
• Spinal nerves
• Suboccipital muscles
• Thoracic vertebrae
• Thoracolumbar fascia
• Vertebral column

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