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Related Concept Videos

Cranial Nerves: Types Part I01:14

Cranial Nerves: Types Part I

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves, with the first six being essential in sensory perception, motor control, and autonomic functions related to the head and neck.
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Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
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Cranial Nerves: Types Part II01:22

Cranial Nerves: Types Part II

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Cranial nerves are responsible for transmitting motor and sensory information between the brain and various parts of the body. There are twelve pairs of cranial nerves. While the first six innervate the head and neck, the latter six nerves innervate the head and neck, as well as organs and tissues in the thoracic and abdominal cavities. They facilitate communication, expression, and autonomic control within the human body.
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The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...
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The craniofacial muscles are a collection of approximately 20 thin skeletal muscles situated beneath the skin of the face and scalp. These muscles, primarily responsible for the vast array of human facial expressions, originate from the bones or fibrous structures of the skull and extend outwards to connect with the skin. While most skeletal muscles in the body are enveloped in thick fascia, facial muscles generally have a more delicate fascial covering, with the buccinator muscle being a...
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The tip-of-the-tongue (TOT) phenomenon is a cognitive experience characterized by a temporary inability to retrieve specific information from memory despite having a strong feeling of knowing the information. Although individuals cannot access the target word or detail, they frequently recall related elements, such as its initial letter, syllable count, or context. This partial retrieval often causes frustration, as one might recognize a familiar face or know that a name starts with a specific...
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Updated: Oct 3, 2025

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
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Numb chin syndrome.

Fredrik Eika, Johanna Elisabeth Rykke Berstad

    Tidsskrift for Den Norske Laegeforening : Tidsskrift for Praktisk Medicin, Ny Raekke
    |February 16, 2022
    PubMed
    Summary

    Numb chin syndrome, a trigeminal nerve sensory neuropathy, can indicate serious conditions like malignancy. This case highlights a mandibular mass presenting as isolated chin numbness, emphasizing the need for thorough investigation.

    Area of Science:

    • Neurology
    • Oncology
    • Radiology

    Background:

    • Numb chin syndrome is sensory neuropathy affecting the trigeminal nerve's mandibular division.
    • It can be subtle, potentially masking serious underlying pathologies like malignancy or inflammatory diseases.

    Observation:

    • A case report details a patient presenting with isolated right chin numbness.
    • Radiological imaging revealed a lytic mandibular mass extending through the mental foramen.

    Findings:

    • The patient's numb chin syndrome was attributed to a mandibular malignancy.
    • Multidisciplinary evaluation was crucial in diagnosing the cause.

    Implications:

    • This case underscores the importance of investigating numb chin syndrome, even when isolated.

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  • Early detection of malignancy presenting as numb chin syndrome is critical for patient outcomes.