Normal Growth of the Sutures of the Skull

Calandrelli, Rosalinda; Pilato, Fabio; D’Apolito, Gabriella; Panfili, Marco; Colosimo, Cesare

doi:10.1007/978-3-030-72338-5_7

Cited by 2 publications

(2 citation statements)

References 52 publications

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“…By contrast, the timing of human midsphenoidal closure and growth cessation is generally agreed to be perinatal (e.g. Calandrelli et al, 2021; Ford, 1958), which is much earlier than in macaques and well in advance of the human brain nearing its adult size between 3 and 6 years (Jeffery et al, 2022; Lenroot & Giedd, 2006). This suggests there is a negative shift in the capacity for cranium growth in modern humans compared with macaques (see also Ashton, 1957; Scott, 1958).…”

Section: Discussionmentioning

confidence: 99%

Postnatal growth and spatial conformity of the cranium, brain, eyeballs and masseter muscles in the macaque (Macaca mulatta)

Jeffery

Manson

2023

Journal of Anatomy

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Spatial growth constraints in the head region can lead to coordinated patterns of morphological variation that pleiotropically modify genetically defined phenotypes as the tissues compete for space. Here we test for such architectural modifications during rhesus macaque (Macaca mulatta) postnatal ontogeny. We captured cranium and brain shape from 153 MRI datasets spanning 13 to 1090 postnatal days and tested for patterns of covariation with measurements of relative brain, eyeball, and masseter muscle size as well as callosal tract length. We find that the shape of the infant (<365 days) macaque cranium was most closely aligned to masseter muscle and brain size measured relative to face size. Infant brain and juvenile (365–1090 days) cranium shape were more closely linked with brain size relative to basicranium and face size. Meanwhile, the juvenile macaque brain shape was dominated by the size of the brain relative to that of the basicranium. Associations with relative eyeball size and commissural tract lengths were weaker. Our results are consistent with a spatial‐packing regime operating during postnatal macaque ontogeny, in which relative growth of the masseter, face and basicranium have a greater influence than brain growth on the overall shape of the cranium and brain.

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Section: Discussionmentioning

confidence: 99%

Postnatal growth and spatial conformity of the cranium, brain, eyeballs and masseter muscles in the macaque (Macaca mulatta)

Jeffery

Manson

2023

Journal of Anatomy

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“…The human neurocranium is characterized by the presence of prominent fibrous synarthrotic sutures that separate the two parietal bones (sagittal suture), the parietals and occipital (lambdoid), the parietals and the squamous temporal (squamosal), and the parietals and frontal (coronal). These four sutures persist into adulthood and, as a result of mechanotransductional and related molecular mechanisms that affect osteoblastic activity (Beederman et al, 2014; Katsianou et al, 2021), generally begin to undergo fusion in the third decade of life, although there is considerable variation in both sequence and timing (Calandrelli et al, 2021; Ruengdit et al, 2020). A fifth neurocranial suture (interfrontal, or metopic) separates the left and right frontal bones in the fetus and neonate.…”

Section: Introductionmentioning

confidence: 99%

Metopism in adult South Africans and its relationship to frontal sinus size

Grine,

Greening,

Hernandez

et al. 2023

The Anatomical Record

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This study documents the incidences of complete and partial metopism and their possible relationship to frontal sinus volume (FSV) in a sample of modern adult black South Africans with a view to evaluating the hypothesis that metopism affects frontal sinus hypoplasia. FSV was measured from CT scans and the incidence of metopism was recorded from direct observations of dried cadaveric crania. The sex of each individual was known. Four linear cranial dimensions were used to compute a geometric mean by which to scale FSV. The incidence of partial metopism (38%) is comparable to that reported for other population samples, although there is considerable variation among these global sample frequencies. It is significantly more common in male than female South Africans. FSV in individuals with complete metopism is smaller than average but not inordinately so. On the other hand, FSV is significantly larger in individuals with partial metopism than in those that do not present with this sutural remnant. The data on FSV in individuals with and without partial metopism contradict the hypothesis that there is a relationship between partial metopism and frontal sinus hypoplasia. As such, the metopic remnant evinced by the Late Pleistocene cranium from Hofmeyr, South Africa is unlikely to be related to its very small FSV.

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Normal Growth of the Sutures of the Skull

Cited by 2 publications

References 52 publications

Postnatal growth and spatial conformity of the cranium, brain, eyeballs and masseter muscles in the macaque (Macaca mulatta)

Postnatal growth and spatial conformity of the cranium, brain, eyeballs and masseter muscles in the macaque (Macaca mulatta)

Metopism in adult South Africans and its relationship to frontal sinus size

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