The principal sensory nucleus of trigeminal nerve (or chief sensory nucleus of V, main trigeminal sensory nucleus) is a group of second-order neurons which have cell bodies in the caudal pons.. This area contains nerve fibers, called glomus bodies. This area contains nerve fibers, called glomus bodies. Anterior cranial fossa; Middle cranial fossa. These emerge on the inferior aspect of the skull at the base of the occipital condyle and provide passage for an important nerve to the tongue. Structure. The largest pair of jugular veins are the internal jugular veins. The mean jugular venous pressure is defined as a distance between the midpoint of the right atrium and the palpable jugular venous pulsation. contents The occipital bone located at the skull base features the foramen magnum. Near the middle of the squamous part of occipital bone is the external occipital protuberance, the highest point of which is referred to as the inion.The inion is the most prominent projection of the protuberance which is located at the posterioinferior (rear lower) part of the human skull.The nuchal ligament and trapezius muscle attach to it.. Foramen spinosum Mandibular nerve Zygomatic process Central facial palsy These can be either acquired or congenital disorders. Contents. Pterygopalatine ganglion It exits the cranium via the jugular foramen, with the glossopharyngeal and accessory nerves (CN IX and XI respectively). Within the cranium, the auricular branch arises. The examiner palpates the internal jugular vein in order to determine the location and quality of the jugular venous pulse. The principal sensory nucleus of trigeminal nerve (or chief sensory nucleus of V, main trigeminal sensory nucleus) is a group of second-order neurons which have cell bodies in the caudal pons.. Contents. In anatomy, a fossa (/ f s /; plural fossae (/ f s i / or / f s a /); from Latin fossa, "ditch" or "trench") is a depression or hollow, usually in a bone, such as the hypophyseal fossa (the depression in the sphenoid bone). The pterygopalatine ganglion (aka Meckel's ganglion, nasal ganglion, or sphenopalatine ganglion) is a parasympathetic ganglion found in the pterygopalatine fossa.It is largely innervated by the greater petrosal nerve (a branch of the facial nerve); and its postsinaptic axons project to the lacrimal glands and nasal mucosa. This is a large hole that allows the brain and brainstem to connect to the spine. It begins in the posterior compartment of the jugular foramen, at the base of the skull.It is somewhat dilated at its origin, which is called the superior bulb. Skin. The lateral and medial pterygoid plates (of the pterygoid process of the sphenoid bone) diverge behind and enclose between them a V-shaped fossa, the pterygoid fossa.This fossa faces posteriorly, and contains Mental foramen "Orbit" can refer to the bony socket, or it can also be used to imply the contents. The largest pair of jugular veins are the internal jugular veins. Head and neck anatomy The petrous part of the temporal bone is pyramid-shaped and is wedged in at the base of the skull between the sphenoid and occipital bones.Directed medially, forward, and a little upward, it presents a base, an apex, three surfaces, and three angles, and houses in its interior, the components of the inner ear.The petrous portion is among the most basal elements of the skull It is caused by a lower motor neuron lesion in the medulla oblongata, or from lesions to these nerves outside the brainstem.This may be caused by any of a number of Related pathophysiology. Operative Neurosurgery Speaks! Skull The skull consists of three parts, of different embryological originthe neurocranium, the sutures, and the facial skeleton (also called the membraneous It begins in the posterior compartment of the jugular foramen, at the base of the skull.It is somewhat dilated at its origin, which is called the superior bulb. Within the cranium, the auricular branch arises. : 776 the basilar part of occipital bone, forming the posteromedial border. The inner surface of the occipital bone forms the base of the posterior cranial fossa.The foramen magnum is a large hole situated in the middle, with the clivus, a smooth part of the occipital bone travelling upwards in front of it.The median internal occipital crest travels behind it to the internal occipital protuberance, and serves as a point of attachment to the falx cerebri. Occipital bone Table of cranial nerves The examiner palpates the internal jugular vein in order to determine the location and quality of the jugular venous pulse. Central facial palsy Fossa (anatomy The zygomatic process of the temporal bone is a long, arched process projecting from the lower part of the squamous portion of the temporal bone.It articulates with the zygomatic bone.. The zygomatic process of the temporal bone is a long, arched process projecting from the lower part of the squamous portion of the temporal bone.It articulates with the zygomatic bone.. In the articulated skull this foramen leads from the pterygopalatine fossa into the posterior part of the superior meatus of the nose, and transmits the sphenopalatine This is a large hole that allows the brain and brainstem to connect to the spine. Most foramina in which relevant nerves and blood vessels pass through are located at the base of the skull. External occipital protuberance The jugular foramen may be subdivided into The mandibular nerve immediately passes between tensor The foramen ovale is one of two cranial foramina in the greater wing, the other being the foramen spinosum. Located at the anterior-lateral margin of the foramen magnum is the hypoglossal canal. Near the middle of the squamous part of occipital bone is the external occipital protuberance, the highest point of which is referred to as the inion.The inion is the most prominent projection of the protuberance which is located at the posterioinferior (rear lower) part of the human skull.The nuchal ligament and trapezius muscle attach to it.. LWW The mean jugular venous pressure is defined as a distance between the midpoint of the right atrium and the palpable jugular venous pulsation. The brainstem is comprised of the medulla oblogata, pons and midbrain and continues down through the foramen magnum to become the spinal cord. The internal jugular vein is a paired jugular vein that collects blood from the brain and the superficial parts of the face and neck.This vein runs in the carotid sheath with the common carotid artery and vagus nerve.. The normal mean jugular venous pressure is 6-8 cm H2O (4.4-5.8 mmHg). X Vagus This supplies sensation to the posterior part of the external auditory canal and external ear. Stylomastoid foramen The foramen ovale is one of two cranial foramina in the greater wing, the other being the foramen spinosum. A glomus jugulare tumor grows in the temporal bone of the skull, in an area called the jugular foramen. These emerge on the inferior aspect of the skull at the base of the occipital condyle and provide passage for an important nerve to the tongue. Internal jugular vein Receives taste from the posterior 1/3 of the tongue, provides secretomotor innervation to the parotid gland, and provides motor innervation to the stylopharyngeus. Posterior cranial fossa Temporal bone The stylomastoid foramen is a foramen between the styloid and mastoid processes of the temporal bone of the skull. An underdeveloped posterior cranial fossa can cause ArnoldChiari malformation. Located in the jugular foramen. Deep cervical fascia Each incisive canal transmits a nasopalatine nerve, and an anastomosis of the greater palatine artery and a posterior septal The posterior cranial fossa houses the brainstem and cerebellum.. Some examples include: In the Skull:. The deep cervical fascia (or fascia colli in older texts) lies under cover of the platysma, and invests the muscles of the neck; it also forms sheaths for the carotid vessels, and for the structures situated in front of the vertebral column.Its attachment to the hyoid bone prevents the formation of a dewlap.. The incisive canals (also: "nasopalatine canals") are two bony canals of the anterior hard palate connecting the nasal cavity and the oral cavity.An incisive canal courses through each maxilla.Below, the two incisive canals typically converge medially. The foramen spinosum is These can be either acquired or congenital disorders. LWW Fossa (anatomy This process is at first directed lateralward, its two surfaces looking upward and downward; it then appears as if twisted inward upon itself, and runs forward, its surfaces now looking medialward Anterior cranial fossa; Middle cranial fossa. The occipital bone located at the skull base features the foramen magnum. Incisive canals Some examples include: In the Skull:. The normal mean jugular venous pressure is 6-8 cm H2O (4.4-5.8 mmHg). The inner surface of the occipital bone forms the base of the posterior cranial fossa.The foramen magnum is a large hole situated in the middle, with the clivus, a smooth part of the occipital bone travelling upwards in front of it.The median internal occipital crest travels behind it to the internal occipital protuberance, and serves as a point of attachment to the falx cerebri. The zygomatic process of the temporal bone is a long, arched process projecting from the lower part of the squamous portion of the temporal bone.It articulates with the zygomatic bone.. Jugular View now The posterior cranial fossa is formed in the endocranium, and holds the most basal parts of the brain. Operative Neurosurgery is proud to offer audio abstracts in 11 different languages, translated and read by native speakers. These emerge on the inferior aspect of the skull at the base of the occipital condyle and provide passage for an important nerve to the tongue. : 776 the basilar part of occipital bone, forming the posteromedial border. Facial nerve inflammation in The pons is the largest part of the brainstem, located above the medulla and below the midbrain.It is a group of nerves that function as a connection between the cerebrum and cerebellum (pons is Latin for bridge). The foramen spinosum is a hole located in the greater wing of the sphenoid.It is located posterolateral to the foramen ovale and anterior to the sphenoidal spine.It allows the passage of the middle meningeal artery, middle meningeal vein and usually the meningeal branch of the mandibular nerve (sometimes it passes through the foramen ovale).. Related pathophysiology. They are difficult to locate without ultrasound to assist. This supplies sensation to the posterior part of the external auditory canal and external ear. Structure. : 771 The foramen ovale is posterolateral to the foramen rotundum and anteromedial to the foramen spinosum.Posterior and medial to the foramen is the opening for the carotid canal. The head and neck is covered in skin and its appendages, termed the integumentary system.These include hair, sweat glands, sebaceous glands, and sensory nerves.The skin is made up of three microscopic layers: epidermis, dermis, and hypodermis.The epidermis is composed of stratified squamous epithelium and is divided into the following five sublayers or strata, listed in In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. It is the termination of the facial canal, and transmits the facial nerve, and stylomastoid artery. Petrous part of the temporal bone Wikipedia The flow of blood to the nasal mucosa, in particular the In anatomy, the orbit is the cavity or socket of the skull in which the eye and its appendages are situated. 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