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The ability to wiggle one's ears is a rare skill, with only about 10-20% of people possessing it. This ability is made possible by three muscles: the auricularis anterior, posterior, and superior. The movement of the external ear using these muscles is a vestigial trait, meaning it once served a purpose but no longer does. While it may now simply be a fun party trick, some have argued that it is genetic, with certain people possessing the muscles required for ear wiggling.
| Characteristics | Values |
|---|---|
| Muscles Involved | Auricularis anterior, posterior, and superior |
| Control of Muscles | Voluntary and involuntary |
| Genetic Influence | Possibly genetic, but unclear if it is passed on |
| Prevalence | About 10-20% of people |
| Neural Supply | Facial nerve (cranial nerve VII) |
| Function | Vestigial trait, once used for auditory attention |
| Learnability | Some sources suggest it can be learned with practice |
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What You'll Learn
The ability to wiggle your ears is genetic
The ability to wiggle one's ears is considered to be genetic. The muscles that enable people to wiggle their ears are determined by their genes, similar to the genes that allow eye movement or tongue rolling. However, it is unclear whether the ability to wiggle ears is inherited or passed on. While some sources suggest that the ability may be influenced by genetics, with a higher likelihood if one or both parents possess the trait, others argue that anyone can learn to wiggle their ears with practice.
The muscles responsible for ear wiggling are called auriculars, and they are located above and behind the ears. These muscles were useful to our ancestors, allowing them to perk their ears towards sounds they found interesting. While humans have largely lost this ability, some individuals can still voluntarily wiggle their ears, indicating that the underlying brain circuits and muscles remain present. This ability is considered a vestigial trait, serving no functional purpose in humans today.
Research suggests that everyone has the capacity to move their ears to some extent, but the ease of ear wiggling varies among individuals. Some people possess traits that make it easier for them to wiggle their ears, and stronger muscles around the ear can also be advantageous. While the ability to wiggle ears may not be useful, it is a fun party trick and can be learned with patience and practice, regardless of genetic predisposition.
The AncestryDNA team conducted a study with over 790,000 participants, aiming to determine the genetic connection to ear-wiggling ability. They concluded that genetics played a role in the variation of ear-wiggling ability, but a larger portion was attributed to practice and behaviour. Additionally, they found that the vestigial ear muscles still exhibited slight movement when individuals tried to listen to sounds from different directions. This discovery could have implications for improving the accuracy of hearing aids by detecting electrical activity in the surrounding ear muscles.
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The auricularis anterior, posterior, and superior muscles are involved
The ability to wiggle one's ears is a result of the three muscles attached to the external ear, namely the auricularis anterior, posterior, and superior muscles. These muscles are situated forward, above, and behind the ear, respectively.
The auricularis anterior muscle lifts the ear upward and towards the face. This muscle is supplied by the facial nerve (cranial nerve VII) and its temporofacial branch, which receives anastomosis from the auriculotemporal nerve (V3, mandibular nerve).
The auricularis posterior muscle draws the ear towards the back of the head. This muscle is supplied by the posterior auricular branch of the facial nerve (cranial nerve VII).
The auricularis superior muscle is responsible for lifting the ear upward. Like the auricularis anterior, it is supplied by the facial nerve (cranial nerve VII).
While these muscles possess very little action in humans, some people exhibit increased activity, allowing them to wiggle their ears. This ability is considered a vestigial trait, once useful to our ancestors but now reduced to a fun party trick. It is believed to be genetic, with the necessary muscles being set up by our genes, although the mechanism of inheritance is not yet clear.
Some sources suggest that with practice, anyone can learn to wiggle their ears, although it may be easier for some individuals due to their genetic predisposition. Techniques to improve ear wiggling include warming up the entire face, concentrating on the muscles involved, and practicing moving other facial muscles first.
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The auricular muscles are vestigial in humans
The auricular muscles, or ear muscles, are indeed vestigial in humans. Vestigial traits refer to structures or organs that have lost most of their original function during the evolutionary process. In the case of the auricular muscles, they were once crucial for the survival of our species, but today they have very little action.
The auricular muscles are a group of muscles located around the ear, including extrinsic and intrinsic muscles, which play a role in the movement and reflexogenic functions of the ear. The extrinsic muscles of the auricle, or the outer ear, are innervated by the facial nerve and include the auricularis superior, auricularis anterior, and auricularis posterior. These muscles possess limited movement capabilities: the anterior auricular can draw the auricle forward and upward, the superior auricular can slightly raise it, and the posterior auricular can draw it backward.
Some individuals have increased activity in these muscles and can wiggle their ears. The ability to wiggle one's ears is likely genetic, as it is determined by the presence of specific muscles, and may be passed down from parents who possess this ability. However, it is unclear whether everyone can learn to wiggle their ears with practice, regardless of their genetic predisposition.
Despite their limited movement, the auricular muscles are not entirely useless. They are linked to the limbic system deep within our brains and can be manipulated to affect circulation to the face. Additionally, they may still play a role in orienting our attention towards unexpected or salient sounds, as evidenced by experiments that recorded electrical activity in the ear muscles in response to surprising sounds.
In summary, the auricular muscles in humans are considered vestigial as they have lost much of their original function. While they exhibit minimal movement and are of little functional significance, they may still be linked to our attention and emotional responses.
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The muscles are controlled by the facial nerve
The ability to wiggle one's ears is a genetic trait that is passed down from parents to their offspring. The muscles that enable this movement are called auricular muscles or auriculi, and they are located above and behind the ears. These muscles are vestigial, meaning they once served a purpose but have since become obsolete in humans. While they are useless for humans now, they are still useful for animals like cats, who use them to listen for prey.
The auricular muscles are supplied by the facial nerve, also known as cranial nerve VII. The nerve has two branches: the temporal branch and the posterior auricular branch. The temporal branch supplies the anterior and superior auricular muscles, while the posterior auricular branch supplies the posterior auricular muscle and the intrinsic auricular muscles.
The anterior auricular muscle draws the ear forward and upward, the superior auricular muscle raises it slightly, and the posterior auricular muscle draws it backward. Some people have increased activity in these muscles, allowing them to wiggle their ears voluntarily. However, for most individuals, these muscles possess very little action and are considered to have little functional significance.
The facial nerve also has connections to the limbic system deep within our brains. The superior and posterior auricular muscles, innervated by the facial nerve, are particularly important in this regard. This neural connection may explain why some individuals can exhibit voluntary ear wiggling, as it indicates a potential link between the muscles and our cognitive processes.
While ear wiggling may seem like a pointless skill, it is a remnant of our evolutionary past. The ability to move our ears was once useful to our ancestors, but over time, as it served less of a purpose, humans lost the ability to do so easily. Today, it is considered a fun party trick, and some people can even learn to wiggle their ears with practice.
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Ear wiggling is a vestigial trait
The ability to wiggle one's ears is genetic, with certain individuals possessing increased activity of the auricular musculature. While ear wiggling may not be useful to humans anymore, it is still observed in other animals such as cats, dogs, and monkeys, who use it to perk their ears towards interesting sounds. This suggests that humans may have lost this ability during evolution.
Research has found that humans do exhibit tiny involuntary movements in the vestigial muscles surrounding the ear when they are straining to hear or focusing their attention on a specific sound. These movements are much smaller compared to those generated during other facial expressions, such as biting or smiling.
The existence of vestigial traits like ear wiggling can be attributed to mutations in our DNA. While mutations in important DNA segments can be harmful or even fatal, mutations in non-essential genes, such as those responsible for vestigial traits, have no significant impact on the organism. As a result, these mutations can persist without being naturally selected out.
While ear wiggling may not serve a direct purpose today, researchers are exploring its potential applications in hearing-aid technology. By sensing and decoding muscular movements, hearing aids could potentially enhance a user's ability to understand sounds by amplifying the desired auditory input while minimising background noise.
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Frequently asked questions
The muscles that wiggle your ears are called auriculars, or more specifically, the auricularis anterior, posterior, and superior. The anterior lifts the ear upward and towards your face, the posterior draws it towards the back of your head, and the superior lifts it upward.
It is believed to be genetic in the sense that our genes set up the muscles that enable ear wiggling. However, it is unclear whether the ability to wiggle one's ears is passed on. Some sources suggest that everyone can learn to wiggle their ears, while others claim that it is dependent on having the genetic ability to do so.
Ear wiggling is considered a vestigial trait, meaning it once served a purpose but no longer does. While it may now simply be a fun party trick, it is believed that ear wiggling was once useful to our ancestors.
It is generally considered a rare skill, and not everyone may be physically capable of it. However, some sources suggest that anyone can learn with practice, and it may be easier to start by learning how to control other specific muscles in your face.
To wiggle your ears, start by warming your whole face up and then concentrate on the muscles involved, specifically the muscle behind your chin. You can also try moving your eyebrows, as your ears might move along with them. Practice in front of a mirror and be patient, as the muscles may be weak from lack of use.
