System: Musculoskeletal

Tibialis Posterior

Tibialis Posterior The structure indicated is the tibialis posterior muscle of the leg. The muscles of the leg consist of the three compartments: Anterior Posterior Lateral The muscles in the posterior compartment of the leg are separated into a superficial group and a deep group. The superficial group consists of the following leg muscles: Gastrocnemius Plantaris Soleus The deep group consists of the following leg muscles: Popliteus Flexor hallucis longus Flexor digitorum longus Tibialis posterior Generally speaking, the muscles of the posterior compartment serve to plantarflex at the ankle joint, invert the foot and flex the toes. The posterior leg …

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tibialis posterior

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

Popliteus

Popliteus The structure indicated is the popliteus muscle of the leg. The muscles of the leg consist of the three compartments: Anterior Posterior Lateral The muscles in the posterior compartment of the leg are separated into a superficial group and a deep group. The superficial group consists of the following leg muscles: Gastrocnemius Plantaris Soleus The deep group consists of the following leg muscles: Popliteus Flexor hallucis longus Flexor digitorum longus Tibialis posterior Generally speaking, the muscles of the posterior compartment serve to plantarflex at the ankle joint, invert the foot and flex the toes. The posterior leg muscles are …

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popliteus

Levator Scapulae

Levator Scapulae The structure indicated is the levator scapulae muscle. The levator scapulae muscle is one of the superficial muscles of the back. There are three groups of back mucsles: Superficial Intermediate Deep The superficial group of back muscles consists of 5 muscles: Trapezius Latissimus dorsi Levator scapulae Rhomboid major Rhomboid minor The name “levator scapulae”, is the Latin for “elevator of the scapula”, which describes the function of this muscle. Origin: Transverse processes of cervical vertebrae CI to C4 Insertion: Upper aspect of medial border of scapula Action: Elevates scapula Innervation: Dorsal scapula nerve Learn more about the anatomy …

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levator scapulae

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 …

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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 …

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vertebral foramen

Gemellus Superior

Gemellus Superior The structure indicated is the gemellus superior. The gemellus superior muscle is one of the muscles of the gluteal region. The muscles in the gluteal region are divided into a superficial and deep group. There are four muscles of the superficial group: Gluteus maximus Gluteus medius Gluteus minimus Tensor fasciae latae There are 5 muscles in the deep group: Gemellus superior Gemellus inferior Quadratus femoris Piriformis Obturator internus The word gemellus comes from the Latin “gemelli” which means “twins”. There are therefore two gemelli muscles, the gemellus superior, and the gemellus inferior. The gemelli muscles are located either …

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superior gemellus

Lesser Sciatic Notch

Lesser Sciatic Notch The structure indicated is the lesser sciatic notch. The lesser sciatic notch lies below the ischial spine, and is converted into the lesser sciatic foramen by the sacrospinous and sacrotuberous ligaments. The greater sciatic notch lies between the ischial spine (inferiorly) and the posterior inferior iliac spine (superiorly). The sacrospinous ligament which attaches from the ischial spine to the lateral aspect of the sacrum and coccyx converts the greater sciatic notch into the greater sciatic foramen. The following structures pass through the lesser sciatic foramen: Tendon of obturator internus Nerve to obturator internus Internal pudendal vessels Pudendal …

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lesser sciatic notch

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 …

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vertebral body

Fibularis Brevis

Fibularis Brevis The structure indicated is the fibularis (peroneus) brevis muscle. The fibularis brevis muscle is one of the muscles of the lateral compartment of the leg. The leg consists of three muscular compartments: anterior, posterior and lateral. The lateral compartment consists of two muscles: Fibularis (peroneus) longus Fibularis (peroneus) brevis The lateral muscles are responsible for eversion of the foot and are innervated by the superficial fibular (peroneal) nerve, which is a branch of the common fibular nerve. The common fibular nerve is a branch of the sciatic nerve and divides into the superficial fibular nerve and the deep …

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fibularis brevis