Articular tubercle: Difference between revisions

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== Aquatic Feeding Mechanisms ==
{{DISPLAYTITLE:Articular Tubercle}}


Aquatic feeding mechanisms refer to the diverse strategies and adaptations employed by aquatic organisms to capture and consume food in water environments. These mechanisms are crucial for survival and have evolved to exploit the unique properties of water, such as its density and viscosity. Aquatic feeding can be broadly categorized into several types, including filter feeding, suction feeding, ram feeding, and others.
The '''articular tubercle''' is a bony eminence on the [[temporal bone]] of the skull. It plays a crucial role in the [[temporomandibular joint]] (TMJ), which is the joint connecting the [[mandible]] (lower jaw) to the skull. This structure is important for the movement and function of the jaw, particularly in activities such as chewing and speaking.


=== Filter Feeding ===
==Anatomy==
[[File:Articular_tubercle_of_temporal_bone_-_skull_-_lateral_view.png|Lateral view of the articular tubercle of the temporal bone|thumb|right]]
The articular tubercle is located on the inferior aspect of the temporal bone, anterior to the mandibular fossa. It forms the anterior boundary of the mandibular fossa, which accommodates the condyle of the mandible. The articular tubercle is covered with fibrocartilage, which provides a smooth surface for the movement of the mandibular condyle during jaw movements.


[[Filter feeding]] is a method where organisms strain suspended matter and food particles from water. This is commonly seen in [[baleen whales]], [[manta rays]], and certain species of [[fish]] and [[invertebrates]]. Filter feeders often possess specialized structures such as baleen plates or gill rakers that allow them to efficiently capture food particles from the water column.
==Function==
The primary function of the articular tubercle is to act as a stabilizing structure for the temporomandibular joint. During the opening of the mouth, the mandibular condyle moves forward and downward onto the articular tubercle. This movement is essential for the full range of motion of the jaw. The articular tubercle helps prevent dislocation of the mandible by providing a bony barrier that limits excessive forward movement of the condyle.


=== Suction Feeding ===
==Clinical Significance==
Disorders of the temporomandibular joint, such as [[temporomandibular joint disorder]] (TMD), can involve the articular tubercle. Symptoms of TMD may include pain, clicking, or locking of the jaw. In some cases, the articular tubercle may be involved in conditions such as [[arthritis]] or trauma, which can affect the function of the TMJ.


[[Suction feeding]] involves creating a negative pressure within the mouth to draw water and prey inside. This method is prevalent among many [[fish]] species, including [[groupers]] and [[seahorses]]. Suction feeding is highly effective in capturing prey that is close to the predator, as it allows for rapid intake of water and prey.
==Related Structures==
The articular tubercle is part of the complex anatomy of the temporomandibular joint, which also includes the mandibular fossa, the articular disc, and the ligaments and muscles that support the joint. The [[articular disc]] is a fibrocartilaginous structure that sits between the mandibular condyle and the temporal bone, providing cushioning and facilitating smooth movement.


=== Ram Feeding ===
==Related Pages==
* [[Temporomandibular joint]]
* [[Mandible]]
* [[Temporal bone]]
* [[Temporomandibular joint disorder]]


[[Ram feeding]] is characterized by the predator moving forward with its mouth open, engulfing prey along with water. This technique is used by species such as the [[manta ray]] and certain [[sharks]]. Ram feeding is advantageous for capturing fast-moving prey or when feeding in open water where prey is abundant.
[[Category:Human anatomy]]
 
[[Category:Skull]]
=== Biting and Chewing ===
 
Some aquatic animals, such as certain species of [[fish]] and [[marine mammals]], use biting and chewing to capture and process their food. This method involves the use of teeth or other hard structures to grasp and break down prey.
 
=== Specialized Feeding Mechanisms ===
 
Certain aquatic organisms have evolved unique feeding mechanisms to exploit specific niches. For example, the [[humpback whale]] uses a technique called bubble net feeding to corral and capture schools of fish. Seahorses, on the other hand, use a rapid snapping motion to capture small prey with their elongated snouts.
 
== Related Pages ==
* [[Filter feeding]]
* [[Suction feeding]]
* [[Ram feeding]]
* [[Baleen whale]]
* [[Manta ray]]
 
== Gallery ==
<gallery>
File:Georgia_Aquarium_-_Giant_Grouper.jpg|A giant grouper, an example of a suction feeder.
File:Manta_alfredi_ram_feeding.png|Manta ray demonstrating ram feeding.
File:Herringramkils.jpg|Herring, often prey for larger filter feeders.
File:Group_of_fish_near_the_beach_of_Sharm_El_Naga.jpg|A school of fish, potential prey for various feeding mechanisms.
File:Humpback_whale_Robert_Pitman_NOAA_PS9.jpg|Humpback whale, known for bubble net feeding.
File:Black_Sea_fauna_Seahorse.JPG|Seahorse, an example of a specialized feeder.
File:Filterkrillkils2.gif|Krill, a common target for filter feeders.
</gallery>
 
[[Category:Feeding mechanisms]]
[[Category:Aquatic biology]]
== Articular_tubercle ==
<gallery>
File:Articular_tubercle_of_temporal_bone_-_skull_-_lateral_view.png|Lateral view of the articular tubercle of the temporal bone
File:Articular_tubercle_of_temporal_bone_-_skull_-_inferior_view03.png|Inferior view of the articular tubercle of the temporal bone
</gallery>

Latest revision as of 11:13, 23 March 2025


The articular tubercle is a bony eminence on the temporal bone of the skull. It plays a crucial role in the temporomandibular joint (TMJ), which is the joint connecting the mandible (lower jaw) to the skull. This structure is important for the movement and function of the jaw, particularly in activities such as chewing and speaking.

Anatomy[edit]

Lateral view of the articular tubercle of the temporal bone

The articular tubercle is located on the inferior aspect of the temporal bone, anterior to the mandibular fossa. It forms the anterior boundary of the mandibular fossa, which accommodates the condyle of the mandible. The articular tubercle is covered with fibrocartilage, which provides a smooth surface for the movement of the mandibular condyle during jaw movements.

Function[edit]

The primary function of the articular tubercle is to act as a stabilizing structure for the temporomandibular joint. During the opening of the mouth, the mandibular condyle moves forward and downward onto the articular tubercle. This movement is essential for the full range of motion of the jaw. The articular tubercle helps prevent dislocation of the mandible by providing a bony barrier that limits excessive forward movement of the condyle.

Clinical Significance[edit]

Disorders of the temporomandibular joint, such as temporomandibular joint disorder (TMD), can involve the articular tubercle. Symptoms of TMD may include pain, clicking, or locking of the jaw. In some cases, the articular tubercle may be involved in conditions such as arthritis or trauma, which can affect the function of the TMJ.

Related Structures[edit]

The articular tubercle is part of the complex anatomy of the temporomandibular joint, which also includes the mandibular fossa, the articular disc, and the ligaments and muscles that support the joint. The articular disc is a fibrocartilaginous structure that sits between the mandibular condyle and the temporal bone, providing cushioning and facilitating smooth movement.

Related Pages[edit]

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