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21 sty 2023 · Atavistic and vestigial structures are found throughout the head, neck, and spine. Some, such as human tails and branchial cysts may be clinically symptomatic. Literature reports indicate that their prevalence varies across populations.
The heart is viewed from the anterior (left upper panel), right lateral (left lower panel), and left lateral (right lower panel) directions, showing anterior pericardial reflection, bilateral pulmonary hila and phrenic nerves, and the sterno-pericardial ligament.
Vestigial Fold and Orifices of the Pericardial Recesses and Sinuses. From a left supero-lateral opening of the pericardium, the vestigial fold arising from the ridge between the left atrial appendage and left pulmonary veins toward the left pulmonary artery is observed (top left).
22 kwi 2015 · Vestigial muscles appear transiently with secondary gill formation in amphioxus, providing additional evidence that bilateral muscular gills and a segmental pattern of branchiomeric muscles...
21 sty 2023 · We provide an overview of important atavistic and vestigial structures in the head, neck, and spine that can serve as a reference for anatomists and clinical neuroscientists.
21 maj 2020 · The neck muscles are representative of these structures; the somite-derived muscles (hypobranchial muscles) differentiate in concert with the NC-derived (i.e., nonsomitic) connective tissues. The cucullaris muscles (whose developmental origin remains in dispute) also develop in the same region.
26 mar 2024 · The anterior neck muscles are a group of muscles located on the anterior aspect of the neck. They can be further subdivided into 5 groups: superficial, scalene, suprahyoid, infrahyoid and anterior vertebral (prevertebral) muscles.
