| 释义 |
Definition of petrosal in English: petrosalnoun pɪˈtrəʊs(ə)lpəˈtrōsəl Anatomy The dense part of the temporal bone at the base of the skull, surrounding the inner ear. Example sentencesExamples - The otic capsule became somewhat separated from the rest of the braincase as a pair of petrosals.
- In pakicetids, the ectotympanic has already overgrown, giving rise to a large bulla surrounding the petrosal.
- In the region of the ear, the tympanic bone is semicircular, and the petrosal is massive and only loosely bound to the basicranium.
- Minimum basioccipital width is narrow relative to cavity width, suggesting the petrosals would have been moderately enlarged (in width two to three times the shortest distance between them).
- Even more so than in Morganucodon, the anterior lamina of the petrosal is medially convex, leaving deep fossa for the semilunar ganglion, the root node of the trigeminal nerve.
adjective pɪˈtrəʊs(ə)lpəˈtrōsəl Anatomy Relating to or denoting the petrosal, or the nerves which pass through it. Example sentencesExamples - Impulses are conveyed via the glossopharyngeal nerve then via its tympanic branch to the tympanic plexus thence to the otic ganglion via the lesser superficial petrosal nerve.
- The temporal lobe, now slack from the mannitol, is retracted from the bone of the middle fossa floor, with care taken not to cause traction on the greater superficial petrosal nerve.
- If the results of the work-up to this point are equivocal or the work-up suggests ectopic ACTH production, inferior petrosal sinus sampling is indicated.
- A foramen may be present in the petrobasilar fissure in front of the jugular foramen through which runs the inferior petrosal sinus.
- Drilling begins directly over the bisection of the angle between the greater superficial petrosal nerve and arcuate eminence and the dura of IAC is exposed beneath the petrous ridge.
Origin Mid 18th century: from Latin petrosus 'stony, rocky' (from petra 'rock') + -al. Definition of petrosal in US English: petrosalnounpəˈtrōsəl Anatomy The dense part of the temporal bone at the base of the skull, surrounding the inner ear. Example sentencesExamples - The otic capsule became somewhat separated from the rest of the braincase as a pair of petrosals.
- In the region of the ear, the tympanic bone is semicircular, and the petrosal is massive and only loosely bound to the basicranium.
- Even more so than in Morganucodon, the anterior lamina of the petrosal is medially convex, leaving deep fossa for the semilunar ganglion, the root node of the trigeminal nerve.
- Minimum basioccipital width is narrow relative to cavity width, suggesting the petrosals would have been moderately enlarged (in width two to three times the shortest distance between them).
- In pakicetids, the ectotympanic has already overgrown, giving rise to a large bulla surrounding the petrosal.
adjectivepəˈtrōsəl Anatomy Relating to the petrosal part of the temporal bone, or the nerves that pass through it. Example sentencesExamples - The temporal lobe, now slack from the mannitol, is retracted from the bone of the middle fossa floor, with care taken not to cause traction on the greater superficial petrosal nerve.
- Drilling begins directly over the bisection of the angle between the greater superficial petrosal nerve and arcuate eminence and the dura of IAC is exposed beneath the petrous ridge.
- A foramen may be present in the petrobasilar fissure in front of the jugular foramen through which runs the inferior petrosal sinus.
- If the results of the work-up to this point are equivocal or the work-up suggests ectopic ACTH production, inferior petrosal sinus sampling is indicated.
- Impulses are conveyed via the glossopharyngeal nerve then via its tympanic branch to the tympanic plexus thence to the otic ganglion via the lesser superficial petrosal nerve.
Origin Mid 18th century: from Latin petrosus ‘stony, rocky’ (from petra ‘rock’) + -al. |