System: Skeletal

Medial Cuneiform Bone

Medial Cuneiform Bone The structure indicated is the medial cuneiform bone of the foot. The foot contains three groups of bones: Tarsals Metatarsals Phalanges The medial cuneiform bone is one of seven tarsal bones. There are three groups of tarsal bones: Proximal group Intermediate group Distal group The medial cuneiform bone belongs to the distal group of tarsal bones. There are three cuneiform bones: Lateral cuneiform Intermediate cuneiform Medial cuneiform Anteriorly they articulate with the medial three metatarsals. Posteriorly they articulate with the navicular bone, and laterally they articulate with the cuboid bone. Learn more about the bones of the …

Medial Cuneiform Bone Read More »

medial cuneiform

Triquetral Bone

Triquetral Bone The structure indicated is the triquetral bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The triquetral bone is one of four bones in the proximal row of carpals (scaphoid, lunate, triquetral, pisiform). The triquetral bone is located medially in the hand and articulates with the pisiform bone, the hamate and lunate bones. On the medial aspect of the volar surface of the triquetral bone is a facet for articulation with the small pisiform …

Triquetral Bone Read More »

triquetral bone

Trapezoid Bone

Trapezoid Bone The structure indicated is the trapezoid bone of the hand. There are three groups of bones in the hand: Carpal bones (8 in total) Metacarpal bones Phalanges The carpal bones are separated into two rows: Proximal row Distal row The trapezoid bone is located in the distal row of carpal bones. There are four bones in the distal row: Trapezium Trapezoid Capitate Hamate It’s easy to confuse the location of the trapezoid with the adjacent and similarly named trapezium bone. A way to remember where the trapezium is located is that trapezi-UM rhymes with thUMB, and therefore articulates …

Trapezoid Bone Read More »

trapezoid bone

Intermediate Cuneiform

Intermediate Cuneiform The structure indicated is the intermediate cuneiform bone of the foot. The foot contains three groups of bones: Tarsals Metatarsals Phalanges The intermediate cuneiform bone is one of seven tarsal bones. There are three groups of tarsal bones: Proximal group Intermediate group Distal group The intermediate cuneiform bone belongs to the distal group of tarsal bones. There are three cuneiform bones: Lateral cuneiform Intermediate cuneiform Medial cuneiform Anteriorly they articulate with the medial three metatarsals. Posteriorly they articulate with the navicular bone, and laterally they articulate with the cuboid bone. Learn more about the bones of the foot in …

Intermediate Cuneiform Read More »

intermediate cuneiform

Lamina

Lamina The structure indicated is the lamina of the vertebra. The typical vertebra consists of the following features: Vertebral body Vertebral arch (neural arch) consisting of lamina and pedicle Spinous process Transverse process Vertebral foramen (collectively form vertebral canal) Superior and inferior articular processes Superior and inferior vertebral notches The vertebral arch is formed from two pedicles and two laminae. The pedicles attach on either side to the posterolateral aspects of the vertebral body and unite posteriorly with the laminae which complete the vertebral arch. The laminae provide attachment for the ligamentum flavum, which connect adjacent laminae along the length …

Lamina Read More »

lamina

Spinous Process of Vertebra

Spinous Process of Vertebra The structure indicated is the spinous process of the vertebra. The typical vertebra consists of the following features: Vertebral body Vertebral arch (neural arch) consisting of lamina and pedicle Spinous process Transverse process Vertebral foramen (collectively form vertebral canal) Superior and inferior articular processes Superior and inferior vertebral notches The vertebral arch extends posteriorly from the vertebral body, comprised of two pedicles which extend from the posterolateral aspects of the vertebral body to join the two laminae on either side which complete the vertebral arch and enclose the vertebral foramen. Projecting posteriorly in the midline from …

Spinous Process of Vertebra Read More »

spinous process

Pedicle

Pedicle The structure indicated is the pedicle of the vertebra. The typical vertebra consists of the following features: Vertebral body Vertebral arch (neural arch) consisting of lamina and pedicle Spinous process Transverse process Vertebral foramen (collectively form vertebral canal) Superior and inferior articular processes Superior and inferior vertebral notches The vertebral arch is formed from two pedicles and two laminae. The pedicles attach on either side to the posterolateral aspects of the vertebral body and unite posteriorly with the laminae which complete the vertebral arch. Learn more about the anatomy of the vertebrae in this tutorial.
pedicle

Transverse Process of Vertebra

Transverse Process of Vertebra The structure indicated is the transverse process of the vertebra. The typical vertebra consists of the following features: Vertebral body Vertebral arch (neural arch) consisting of lamina and pedicle Spinous process Transverse process Vertebral foramen (collectively form vertebral canal) Superior and inferior articular processes Superior and inferior vertebral notches The transverse processes of the vertebrae extend from the vertebral arch at the point where the pedicles meet the lamina, and lie in between the superior and inferior articular processes. A facet on the transverse processes of the thoracic vertebrae serves as the point of articulation for …

Transverse Process of Vertebra Read More »

transverse process

Vertebral Foramen

Vertebral Foramen The structure indicated is the vertebral foramen. There are 33 vertebrae which make up the spinal column: 7 cervical 12 thoracic 5 lumbar 5 fused sacral vertebrae 3-4 fused coccygeal vertebrae The typical vertebra consists of the following features: Vertebral body Vertebral arch (neural arch) consisting of lamina and pedicle Spinous process Transverse process Vertebral foramen (collectively form vertebral canal) Superior and inferior articular processes Superior and inferior vertebral notches The spinal cord passes through the vertebral foramina of the vertebrae: the collective vertebral foramina are referred to as the vertebral canal, or spinal canal. The anterior part …

Vertebral Foramen Read More »

vertebral foramen

Vertebral Body

Vertebral Body The structure indicated is the vertebral body. There are 33 vertebrae which make up the spinal column: 7 cervical 12 thoracic 5 lumbar 5 fused sacral vertebrae 3-4 fused coccygeal vertebrae The typical vertebra consists of the following features: Vertebral body Vertebral arch (neural arch) consisting of lamina and pedicle Spinous process Transverse process Vertebral foramen (collectively form vertebral canal) Superior and inferior articular processes Superior and inferior vertebral notches The vertebral body is the largest component of the vertebra. Between adjacent vertebrae within the spinal cord, the vertebral bodies are joined by intervertebral discs which form fibrocartilaginous …

Vertebral Body Read More »

vertebral body